Disney cannot completely control this...obviously. The Species Survival Plan only applies to endangered species. The Plan assigns an ID number to even animal in the species it covers, and it chooses which genes would work well together. Then, disney will place those two animals alone together for a few nights. If they don't want to mate, disney certainly can't make them mate. Also, in terms of elephants, it is the matriarch of the herd that decides which males mate which which females. The male they want to mate currently is a bit young and the matriarch says "NO!" Needless to say, Disney cannot control this. Disney would be VERY pleased, however, if they did mate. Actually, there have been MANY births at animal kingdom since opening. The fowl mate on a yearly basis and disney has had tremendous success with some of the endangered (SSP) animals--this is why other zoos send their head zookeepers to Animal Kingdom for tips. Disney literally has the best vets and keepers in the nation.