As far as video games are concerned they should really consider getting the AVP 2010 license for their Predators and Colonial Marine lines.
Specifically the bottom 2 Predators, Spartan, Lord, and maybe Stalker.
Marines I'd Say Van Zandt, Rookie, Tequila and maybe Kaneko
But they could do any of the marines or predators from that game and I'd be happy. Lot of characters to choose from and all they would "basically" have to do for the marines or the predators is sculpt different heads for the pre-existing body/armor molds they have.