Death's Head: You're right... there isn't much in there
Snuzzleduck: I'm sorry to rain on your parade, but somebody has to, and I've nominated myself for this evil task. I'm going to tell you exactly what's wrong with the story you created. Then you have a choice - you can either ignore me by assuming that I'm just being nasty, or you can try to fix these problems and thus create a much better story.
"New Kilrathi empire" - there ain't no such thing, and Confed would never allow it to be created. The Kilrathi government currently recognised by the Confederation is the Assembly of Clans. This is probably comparable to our modern UN - ie., a totally powerless organisation bringing together the whole world, but being controlled by one or two of its members.
"It was there that the Nephilim found their first allies in the war." - Not a chance. The Nephilim have made it clear that they're here to burn, loot, destroy, and of course kill
. They do not need allies, and they do not want them. Remember, Confed was unaligned in the Nephilim-Kilrathi conflict. Had the bugs wanted an ally, they would have made some peaceful overtures towards Confed. They didn't, and ignored all Confed attempts at communication.
"The Children of Sivar" - Entirely possible, but keep in mind what I said above. Thus, you'd probably have a situation where the Children attempt to help the bugs in any way, and then get slaughtered for it. Also, keep in mind that the Kilrathi do not rebel against "oppression"; only against dishonour. The four Kilrathi planets in WC 2 rebelled not because they didn't want to be ruled by the higher class, but simply because Prince Thrakhath had acted dishonourably.
"With their access to our space still limited, they have allied with the lower clans of the Kilrathi, exchanging advanced technology for the troops and manpower they need to continue their war" - No way. They've clearly proven that manpower is something they have in plentiful supply. In fact, following their lost battle against Confed, the bugs would more likely use less numerous, but more powerful craft. And if the Nephilem cannot stop Confed from taking out wormholes, then the Kilrathi lowborns can't either.
"The Great Council" - The what?
"As such, the military has been in a constant state of buildup." - [Dying bug voice] Impossible!! [/Dying bug voice]. We already saw in the SO fiction that the civilian population of Confed was very much interested in cutting down the military. And the whole point of the Midway-class was to reduce costs, not to strengthen the military.
"Firrekan Republic" - Ah, I guess you mean the Firekkan Planetary Alliance. It's not a republic btw. Republics have presidents and democracy. The Firekkans have a very rigid social structure (possibly more so than the Kilrathi), where leaders are born into the position. There is no democracy. They are also very much isolationist. I know you just want to bring in a new faction, and I can't blame you
. But the only way the Firekkans can appear is as individual people (there was a Firekkan serving in the Confed military, and there was a freighter operated by the Firekkans, but not much else). Certainly not as an organised military - even if they were directly threatened, they do not have the technical know-how and resources to build a fleet of spacecraft. They fight planetside.
"Double Helix" - We don't even know where the Double Helix live; they're not shown on the WCP map. Since they obviously had no contact with the Kilrathi, they would have to be somewhere beyond Argent, Hawking, or Avalon sectors. Either way, they communicate using phermones, and as such, inter-species relations are very difficult for them. One or two Confed scientists died
while trying to establish contact, because the DH accidentally fried their brains
. BTW, the DH don't even understand our concept of "history" - do you really think they would understand "alliance" then?
"The Eighth Kilrathi Dynasty" - And like I said above, Confed would never allow this. Even the "doves" in the Senate would "ask" Confed military to "take care of" such a dynasty in the making. Perhaps you should find out a bit about what happened to the Japanese Empire as a result of the surrender agreement.
Right, that's all. Now then, if you decide not to ignore me, but rather to try to fix these, I'm quite willing to help out - to a degree, of course, since I've got plenty of other work right now.