>Megas
Cool mechanic but only some pokemon, some like Rayquaza are broken but in general was a balanced gimmick with the nerfs in sun/moon
>Z moves
Great idea, any pokemon can use it, brings more strategies, not only making super attacking moves but improving status moves with extra effects, balanced.
>G-max
The whole battle system is floating around this, unlike z moves or megas if you don't use this you're in great disadvantage, stupid idea overall wtf is giant holographic energy???
I really hope they don't add a new gimmick, if they bring back megas and z moves I'm satisfied but looking at the Japanese logo there is definitely a new gimmick