One of my friends is a huge Dino Crisis nut. His head would explode if Capcom brought it back...
I can imagine an RE 4/5 style Dino Crisis, with all sorts of weapons. There'd have to be A)A hunting sequence where you're in hot pursuit of Dinosaur B) Chase sequence where you're running like hell to avoid a big baddie, or a group of dino's hunting in packs.
That's all I got. Like the humans vs dino's concept. I'd play it...