Uhmm, idk. It's irresponsible... How would the animals themselves fit into this world? Would they spend their lives in captivity? It's not fair to them.
But if they managed to secure a very large piece of land somewhere and only brought back one or two species... maybe it would be interesting, scientifically speaking, we would learn a lot from this. For selfish reasons i'd love to see this happen, but it's probably not the best idea.
