I don't think this is a good idea:
Duh, Mr. Harvard MD, did you ever read Jurassic Park or watch the movie? Our ancestors exterminated the Neanderthals. If you bring them back, don't you think they might return the favor?
This is nearly as dumb as the project to create autonomous battlefield robots. Didn't those DARPA guys ever watch The Terminator? (I think they did, and they must have liked the outcome.)