I mean, Pokémon Legends: Z-A will bring back Mega Evolution. It will also most likely get a TCG set or two. Maybe even more. I think it's logical to assume Megas will return to the TCG in these sets.
Interesting
Mega Pinsir, Medicham, Banette, Latias and Abomasnow may finally have their TCG debuts. Mega Sableye and Lopunny may finally have their own cards.
Who asked