Deep!
Actually, that sounds kinda similar to what TheKingNappy from youtube theorized. It does seem to have some merit, since Groudon, Kyogre, and Rayquaza are all based on Hebrew mythology (the Behemoth, the Leviathan, and the Ziz, respectively), which is also where the "Alpha and Omega" concept comes from as well. I think there's also going to be some new Mega Evolutions. Latios and Latias, obviously, but I think there's going to be Megas for the other starters as well. Also, I think they'll bring back secret bases and Pokemon Contests ^^