>>57846808They did give a full listing of all the megas on that japanese page regarding megas (the one with the new key art for the megas).
Aside from me expecting them all in (there's only 48 and I doubt L: Z-A's gonna have 400 dexed and 50 hidden transfer bonus pokémon, so likely gonna include all them to the game anyway), the fact they listed them off as a refresher/introduction to those that it regards makes me more certain they're all going to be included (plus they gave away a shiny fug last year, didn't they@ Wanna let kids use shiny mega fug GO in battle).