How far do you think they will go with Mega Evolutions? The list of Pokemon you could get a Mega Evo is limited only by your imagination.
For example, if Venusaur, Charizard x2, Blastoise and Blaziken all have them, I see no reason why Meganium, Typhlosion, Feraligatr, Sceptile, Swampert, Torterra, Infernape, Empoleon, Serperior, Emboar and Samurott can't, and if Alakazam and Gengar do, so could Golem and Machamp. Same with Tyranitar and Garchomp having Mega Evos, so could all the other psuedo-legendaries, not to mention the endless list of crap Pokemon who need a boost and the list of Pokemon who could become even more bad ***.
The possibilities are endless and I absolutely love it!!