I'm not sure what you mean by retro, but maybe it's just the fact that I'm not seeing it. I felt the aliens were like aliens in B5. Anyway, fact is, ME has a more developed plot and universe than most games, so it should be easier to make something that already has story to begin with. My only concern about a prequel is that we wouldn't get the Normandy on screen. It would have to more or less deal with how Shepard becomes a war hero. If they can tap the original script writers for the game, I could see this one being pretty good.