Sega's put out new Aliens: Colonial Marines screenshots, but just three of them.
Still they are three really good shots and show the shooter to be pretty outstanding, visually speaking at least.
Whether the stills are real-time, in-game action or taken from cinematic cut-scenes we don't know. It bodes well for the long-awaited title though.
Of course, gameplay is still going to be the all important factor, but Sega seems pretty confident.