Complex sentence: The remaining Super Friends uncover the scheme and travel back in time to undo the damage; the Flash arrives at Paradise Island and uses super-speed to deflect the rays meant to hit Diana and back at Cheetah, stunning her.
Split into simpler sentences: The remaining Super Friends uncover the scheme and travel back in time to undo the damage. The Flash arrives at Paradise Island and uses his super-speed to deflect the rays meant to hit Diana and back at the Cheetah, stunning her.