The demo has reportedly been broken open and data mined by the same guys who did it with X&Y, most notably revealing stats of all the new Mega Evolutions as well as a Mega Evolution for Hoopa and details about a facility called the Battle Resort. There is quite a bit of evidence behind everything including a few massive text dumps containing names, flavor text, dialog, and script elements that I doubt anyone would take the time to fake, but I'd still be wary of the legitimacy of it all.
If you're feeling hopeful, you can check out the stats and alleged (and very low-res) image of Mega Hoopa on
PokeJungle.
i'm sure they're gonna introduce something new to compensate
I'm assuming that would be Contests