Space marines are from Warhammer 40000 I think. Colonial marines are from Aliens. I just started going through the minifigures and I think a lot of the prerelease names are what I've been calling the figures even though they have official names when they're launched. I think we might see the armor show up in regular sets, so far the only thing I've seen is the gamestop Lex Luthor with the torso armor but no helmet.
, contact me if you'd like to perform trades from my inventory. I'm looking for original genosian fighers, second version a-wing fighters and tie bombers. I may be interested in other sets so let me know what you have.