I'm thinking something epic like alternate Mew and Mewtwo foolishly underestimating their counterparts, only to be in for a surprise when our Mewtwo Mega-Evolves into Mega Mewtwo X and pulling a multiple-hit barrage of Fighting-Type moves, and then switching to Mega Mewtwo Y and bringing on more damage.
For those still loyal to Arceus: The faithful, the world leaders, the British Ministry of Magic, whoever else you got in mind
For those hating Arceus: The H8ers, Militant Atheists, etc.,