Uh, maybe. except that that is pretty much 99% of the list for now. I only forgot to mention Absol. Point is, the Mega form list is only six pokemon thus far
The other day they reviled Mega Kangaskhan,
and said that more Pokemon would Mega Evolve.
Although there is some balance, you are limited to only having one Mega Pokemon in battle, they can only Mega Evolve in battle, and the devolve once the battle ends, also they require a held item and another condition that has yet to be reviled in order to Mega Evolve.