Frankly, it's surprising the new double winner wasn't one step down the evolution ladder.
http://www.nintendoworldreport.com/news/72416/more-mega-evolutions-announced-for-pokemon-legends-z-a-including-post-launch-expansion
Even after our friend Malamar, Pokemon has found time to announce five new Mega Evolutions for next month's Pokemon Legends: Z-A.
The first three were shown as the three original Pokemon X and Y starter final evolutions - Chesnaught, Delphox, and Greninja - will get the Mega forms they didn't receive in their home game. The other two were shown as part of a DLC called "Mega Dimensions" which will, among others, give Raichu two Mega Evolution forms (Mega Raichu X and Mega Raichu Y) as previously seen with Charizard and Mewtwo.