Fanfic RTS Game Factions

This is an idea for an RTS game based on a fanfic idea I have. Basically, here we see the playable factions.
The United Earth Directorate (UED) from StarCraft
The Cardassians from Star Trek
The Alliance, Browncoats, and Reavers from Firefly
And the Cerinians (Krystal's race) from Star Fox

The story building up to it is this:

In 2446, seventy years before the story takes place, the United Powers League encountered the Cardassian Union. Fearing alien invasion, the countries that had stayed out of the UPL joined, and the UPL became the much more millitaristic UED. After two wars, the UED and the Cardassians now have an uneasy truce with one another.

Now, you may ask "Why are the Firefly factions here if Earth got used up in Firefly?" I'll tell you. In the chaos that existed before the founding of the UPL, a small fleet of warp-ships was built by people who wanted to leave Earth. The only countries that could build these ships at the time, were the US and China. And "Earth-that-was" was invented as a way to explain why they left. After the events in Serenity, political unrest has arisen again, and worlds want independence from the government that formed the Reavers. So the Browncoats are arising again.

Cerinia's presence is here because I always thought that we needed an explanation as to what it was like, and how it was destroyed, and also, I just wanted another alien race.

Now, at the time of the story, Cerinia has been caught up in the Cold War between Earth and Cardassia, and the UED has discovered the Alliance, but the Alliance doesn't know that...yet.

As for the symbols, I made up the Reaver and Cerinian symbols, simply because neither had any.

Now, who would you play as?

StarCraft (c) Blizzard Entertainment
Star Trek (c) CBS Paramount
Firefly (c) Fox/Universal
Star Fox (c) Nintendo

P.S. This isn't going to be a real game (in case you haven't figured that out). It's just a fan's dream.