Perhaps if Genetics plays a role Deoxys might be involved, however I kind of doubt it due to it being event exlusive. Not surprised about the Mewtwo Megas being version exclusives. Y seems to have the better ones :l
I have to say Im really liking Froakie's evolution and Fennekin's( I like the witch theme it seems to have going on) I can't wait to see where it's final stage goes. I also like Pyroar and Meowstic. A lot of the Pokemon I feel have been designed pretty well this time around.