Yes, USCM Mod is in works. USCM = US Colonial Marines from the movie Aliens. The mod is loosely connected to the movie itself, but there will be aliens (not many, but some). If you are interested in helping out, e-mail or PM me. Here is some work in progress:

SAM AA Rocket Launcher



Minigun from the movie Predetor



Aliens USCM APC