Zoom/Flash vs Marvel Earth
Lets say if thanos was able to bring wally and zoom from dc and mind warp them to a level where noone can reverse it. He then tells them to kill every hero and villian on the planet earth including all humans.
Strange somehow manage to sense that there are speedster out there killing civilians and Strange develops a telepathic link with almost every hero/villian letting them know of thanos plans and to prepare for battle.
CIS is off for the speedsters.
Could marvel earth survive this assault or would the flashes kill all.