Seems we have all the Mega Evolutions available to us in-game....kinda sucks since we didn't even go over the 100 mark for new + mega Pokemon.
#--- - Mega Blaziken (Fire/Fighting)
Blaziken's stats according to Smogon. It even got a speed boost on top of the speed boost.
#063Co - Mega Mawile (Steel/Fairy)
Evidently they didn't think Mega Mawile was strong enough with Huge Power and 80 base attack, so they ensured it beat Medicham. Kind of a shame though, it could really use more defense. I would have also decreased SAtk in favor of more SDef. Also too bad Game Freak seems to have a "No touching HP policy"