Virtually all wild animals are not truly able to be reintroduced into the wild in the perfect sence. From elephants to tigers there are many problems that arise, each with there own specific problems that are still needing to be looked at. Therefore, man is trying to do it's best at finding ways to preserve what is left and hoping that someday there may be a better future for these beasts. There are a few success stories in the reintroduction of some wild animals, yet to many end up much like the gorillas as discussed here.
Basically, the only thing we are left to do is place them in zoos and other such programs, or just let them go extinct. I highly doubt that man will give his place on earth for them to thrive naturally. At least until we start to go extinct....