An automated rocket returns a shape-shifting alien to Earth, where it wants to play games with Superman and Batman.
The Contest of Heroes (Superman, Batman and Robin / written by Bill Finger)Green Arrow's Kid Brother (Green Arrow)Gray Wolf's Revenge (Tomahawk)Batman: Look, Robin, there's the Bat-Signal summoning us to head-quarters--but what's that?
Superman: That's the Super-Signal, which calls me when I'm needed!
— Description from Comic Vine community (comicvine.gamespot.com).
