Dreamt that all the superpowers of the DC superheros had been corrupted by an evil force. Each use of their powers brought them closer to falling under the sway of something from Beyond. Some heroes, like Superman, could get away without using his heat vision and similar abilities, but the Flash was in trouble. He couldn’t use his abilities at all or risk being lost. Batman, having no real superpowers, was totally unaffected.
Yet they still had to fight the Thing from Beyond. And Flash didn’t want to be totally useless, so ended up using his speed. He was quickly corrupted and ended up fighting Batman, who, of course, had a plan that took out the Flash very quickly. “Speed is useless if you don’t have any timing,” he explained.