I still hope sceptile gets 2 megas, one being a dragon. Also, I would not trust anything at the moment, but people seem to be forgetting a few things.
Mega Blaziken was only an event for 4 months, therefore, you can no longer get if you didn't do the even or trade with someone who did. With this being so, if they bring in Megas, which I am almost 100% sure they will, this would be a good time to make Blaziken available to everyone, along with Sceptile and Swampert.
Also, Maxie and Archie could have a mega of their own. They are not really that evil and obviously love their pokemon, which is why they are trying to give more land to these types of pokemon. This would be a good time to introduce megas for at least one of their pokemon.
Maxie could get Mega Camperupt. He could also get a Houndour.
Archie, could get a mega of Sharpedo. He could also get a mega Craudaunt if they change their teams, which I do not think they will.
They both have Crobats, they they both could get a Mega Crobat, but I do not really like that idea. I think it should be their special pokemon.
People say that it makes no since for them to have Megas in Hoenn, tell me something, why does it make any sense at all for Kalos to have Unova pokemon when Unova was suppose to be far away from other regions? The maker of pokemon has already said he wants every pokemon to have its own Mega eventually.
Also for those saying that they could go without megas because they did it with BW2 and BW Kyreum, that was only 2 pokemon in which you fuse two pokemon together and they stay together until otherwise taken apart. There are 30 mega pokemon right now and they are in battle transformations, not to mention, usually, everyone makes the newer games their main game, so why wouldn't there be megas?
Just because it does not make sense, does not mean it can't happen. Since when does pokemon as a whole make sense? They have always broken this "sense" barrier. Why now is this any different? I think the main reason, is because some people still do not like the concept of megas. This is just my 2 cents.