I'd actually be down for that. I really would. Time travel would be a cool element to add to this franchise, if done right. I'm soooo sick of a bunch of blue-collar smokers and outcasts lining up to get gutted by a giant acid for blood creature. Say what you want about A:R, but at least we got scientists. Granted, they weren't maxed to their potential, but still. It was nice seeing people who weren't societal underdogs for a bit.
Also, f**k Alien 3. It can take the deaths of Hicks and Newt, as well as its mo-motion alien, and shove it up its ass. Squanderer.