>>54871075Since about gen 6 the TCG has always had themed sets based around mechanics and story elements in game with original gimmicks like Break and such being created in the period between games when they already used the central theme.
To name a few that came before.
M = Mega
GX = z-moves
Vmax = dyna/gigantamax
Single/Rapid = Urshifu's forms
And now we have Ancient/Future which is supposed to represent.... Imagination?