Aliens: Colonial Marines is getting downloadable campaign content in the near future, with leaked PS3 trophies revealing all. Stasis Interrupted is the name of the DLC, and it'll be part of the Season Pass some people actually spent money on.
Pricing and details outside of trophies are yet to be revealed, though my guess is it'll be an attempt to give the campaign an actual conclusion, rather than the vaguely comprehensible non-ending to the pathetic four-hour insult to the Aliens legacy we got in the main package. Definitely worth paying more money for, since $60 for half a game just wasn't enough.
You can check out the trophies below, but be warned of potential spoilers. Then again, if you find a way to spoil your Colonial Marines experience more than by actually playing it, you're some sort of X-Man.
I am still not over Colonial Marines, nor will I be in the near future.