Since Nintendo still needs to finish the Torchic event, put all the GTS features up, and release Pokemon Bank, I don't think we'll be seeing these Pokemon until at least March.
Also, there's still one thing I don't understand about this whole thing. Why didn't this hacker catch these Pokemon? If I found a secret legendary, I'd want to catch it and show everyone. Why didd't this person put the Pokemon on the GTS or use them in battles? The only pictures I've seen of these Pokemon are of a person finding them in the wild. Why didn't they show footage of them battling? I don't get it.
Also, I think the pictures of Mega Lati@s are fake. I believe they will be able to Mega Evolve, but why are there pictures showing them Mega Evolve in the wild? Wild Pokemon don't hold Mega Stones, and even if they did, they can't Mega Evolve without a trainer with out a Mega Evolution Activator Thing (the actual name has slipped my mind). And from the pictures I've seen, Mega Latios and Mega Latias look EXACTLY the same. What's going on?