Critique courtesy of GrammarNaziCritiques:
Right away the line “A hundred thousand years ago, there was a planet” has me worried. Why a hundred thousand years ago? Why not ten thousand years or a million years or a hundred thousand and one years? I mean, I doubt it was exactly that number of years, unless this story starts on some kind of celebrated anniversary. It's a cliché but “Long ago” is a much stronger start because it doesn't cause me to ask questions that are unimportant, thus taking me out of the story … or if the number of years is important, how? Consider the line “One year ago the battle began” and what that tells the reader; not just that a battle began or that it began a year ago, but also we can expect a certain mood for the start, a We've Been At War For A Year mood. That's different from one month or several years or a lifetime, and thus interesting.
And then the rest of your first paragraph just confuses me: first the Spacers and the Titans are warring, and I'm cool with that. I imagine these two giant armies clashing, trading blows and not caring about the neutral third parties they hurt or the planets they ravage. But then the Spacers are running desperately from the ruthless and unstoppable Titans? That's not a war, that's a genocide. It sounds like the Titans are doing all the ravaging and the Spacers are just trying to get away. And are they both extraterrestrial? Meaning they chose some planet other than their own to have this not-war?
Second paragraph and onward, I think I'm feeling whiplash from this sudden close-up view of a battle. This works in film when a narrator does a voice-over explaining current events (first paragraph) while we see a battle that epitomizes those events (second paragraph and onward) but you are not writing a film script, you are writing prose. There are differences between the two. Maybe if you made that first paragraph italic to differentiate it?
And because you are not writing a film script, don't do that whole “each Titan was fully armored with bulky muscles and grey skin with glowing purple wounds and scars were clearly visible. They were slightly larger than a Spacer, and have goat horns sticking out at each side of their heads. Each of them carried heavy duty weapons.” That's too much description at once for prose, space out your descriptions and start with the important stuff like the horns. That line feels exactly like you are giving description to the makeup and wardrobe team, it needs to come off more naturally for your readers.
“and scars were clearly visible” makes the sentence run on, try something like, “glowing purple wounds, their scars clearly visible.”
“and have goat horns” needs to use “had” since the rest of this piece is in past tense, be careful with your tenses
For some reason I can't see this first scene very well. I thought Fedlow and his soldiers jumped in a convenient trench and started firing last-stand style, but the Titans were so badass that it did nothing and so the Titans were standing over them - “As they looked up” - about to kill them. But then Fedlow calls for reinforcements, gives a one-liner pep talk and they all shoot some more … and the Titans are only now coming to get them with tanks? I thought they were right there, but now they are across the field of battle?
Don't tell us that the Spacer guns malfunctioned, show us and make it interesting. And what, they all malfunctioned? Isn't that kind of weird or suspicious?
Unless those are self-propelled grenades they did not fly them at the Titans, I think you meant “threw” instead of “flew” … although self-propelled grenades would be pretty futuristic and cool.
“All of a sudden” is one of the most cliché ways to start a sentence; it immediately tells the reader that whatever happens next will be different and important, so why not show how different and important it is instead? Which you do by showing the opposing side become a frozen landscape as a woman in badass armor steps in to the scene and kills all the Titans in thirty seconds. You don't need that start to show that the tide was turned all of a sudden because we see it happen.
“a woman in a bulky diamond full battle suit with” would be easier to understand. And where are the flames? In her armor? In her hands? Above her head? And why does she “appear” as a woman? Using “appeared” like that implies she is not as she seems. Maybe change the last two sentences of that paragraph to say something like, “A woman appeared in a bulky diamond full battle suit, burning blue flames around her hands as she stepped out of the ice cap.” Then when Fedlo bows to her he introduces her more naturally as “Councilor Feidlima” instead of just “Dear Councilor” which feels a little smarmy.
Instead of telling the reader he thinks she is insane, show us in some way, maybe with big shocked eyes, mouth agape, or just have him add, “Are you insane?!”
I'm really curious how they transported the Titans … this could be something to be revealed, but I'm worried it will turn out to be a plot hole. If they could transport the Titans here, why not transport them in to a star or a black hole or something? Or maybe you mean they lured them all here, but then how? Are the Titans really dumb enough to all be lured to one place, to what is obviously a trap?
So I understand that this mountain is also the pyramid mentioned by Captain Carato, and so they were headed there from the start … but they seem to have arrived really quickly. Why wasn't the mountain part of the scenery description during the trench fighting if it was so close? And why did they jump in the trench for a last stand if the mountain where the guys with super powers had gathered was so close? And you know that a mountain is not the same as a pyramid, right? The visual, in other words what the reader sees in their mind's eye, is completely different.
Even more cliché than “All of a sudden” is a man named Judus who smiles and promises to have your back. It's not bad, but I will roll my eyes when he betrays everyone, and if he doesn't betray everyone then why was he set up to do so? It's a lose-lose name unless you are doing something really, really clever with it … which, having read to the end now, maybe you are.
Please read what you write out-loud, preferably with someone listening. Note where it sounds awkward, like “Five domes they must touch to activate the ring” as if Yoda was the narrator. Change those places.
A static image means unmoving, and yet Seiton (lol, Satan) looks at them, his eyes glow red and he snarls. That's a lot of movement right there, not static at all.
How in the world did the vortex pull in every Titan ship, but not the Spacer ships nor the pyramid-ship? Their victory over Satan strains credulity to the breaking point, it's too easy. Maybe someone has to do a heroic sacrifice, maybe Judus shows he isn't such a bad guy by distracting Satan for a while as everyone else sneaks away using cloaking illusions, then Judus hits the win button and goes out with a smile … ha, because Judus was a double agent and is betraying Satan! Or maybe the entire Spacer fleet is banished along with Satan, heroic sacrifice on a species scale, while the Councilors survive because the pyramid is protected.
Okay, so thanks to Feidlima having that convenient vision we now know why a hundred thousand years was important … still, it feels silly, like the narrator knew she would say that later and so was able to say “One hundred thousand years ago!” with complete honesty and without any irony. If it was me, I would take out that “One hundred thousand years ago” from this prologue and instead use “One hundred thousand years later” to start the first chapter because at least by then we know why that number is important … or even better, just get rid of those exact numbers entirely and have Feidlima say that Satan would return someday, she doesn't know when.
Despite it's awkward writing or cliché moments, this prologue genuinely works well to start a story about a world in which technology is both our greatest strength and weakness. Cade wants to guide the primitive race (Humans I assume) to be technologically advanced … which is the stupidest plan he could suggest seeing as Feidlima just told them that Satan would win using their technology, it seems like what he should do is suggest they keep the primitive people primitive while training them to be badass warriors even without tech. But hey, people suggest dumb plans sometimes, it works. Anyway, I can see Cade's dumb plan leading to a modern day where technology is feared (Satan will see you though your TV!) and respected (we need technology to defeat Satan!) and so there are genuine fears of networked technology, but maybe the Humans forgot why and so people are starting to do it anyway … a clever parallel to the real world where social networking is sometimes called the tool of the devil and seems to be capable of both bringing us together and tearing us apart. And meanwhile those Councilors were guiding humanity in their own ways, such as Teutor creating the Teutonic Knights or Judus being Judas. If you're doing something like that I applaud you, that's very ambitious and cool!
In summery, please read what you have written out loud and fix the writing that sounds awkward, there's quite a lot of that; if you don't know what sounds awkward, all I can say is read more. If you want to write a movie script then I suggest you do so, but know the difference between the two. Spelling seems pretty good but there's a small bit of work to be done with tenses still, as well as point of view. Remember to show don't tell, and especially work on describing the environments so that readers can see the scene and know where everything is … but to be honest small stuff like all that is excusable, especially when you have a clever, ambitious and visually dramatic story like I hope you do.