Take a look @ footage, plus images from "The Flash" episode, "The Fury Of Firestorm", written by Kai Yu Wu, Joe Peracchio and directed by Stefan Pleszczynski, that aired October 27, 2015 on The CW, revealing DC Comics' super-villain 'King Shark':
"It was just fun for us," said "The Flash" producer Andrew Kreisberg about the 'King Shark' cameo.
"Obviously we can't afford to do an entire 'King Shark' episode so the idea was that he was one of the minions of 'Zoom', and just the latest in the line.
"Which does mean that there is a King Shark on 'Earth-1'."
Click the images to enlarge and Sneak Peek "The Flash" vs 'King Shark'...