Based on that list that was posted at the XY Rumors thread, my guess is that this the real reason why they brought back Ash's Charizard to the anime, because he's rumored to get a Mega Evolution, and Ash will use it on him all the time, by the time he gets a Mega Stone of course. However, said list also included Heracross, which Ash also owns, so I don't know they'll do, though Blaziken's Mega Evolution could hint May's possible return.
Yes Weezing should have ha own base
