BATMAN/SUPERMAN: WORLD’S FINEST #09

STRANGE VISITOR, CHAPTER THREE: FEARS OF A CLOWN 

Batman and Superman are on a quest to train the mysterious new hero Boy Thunder... but what's that in the dark? A faint noise...sounds like a laugh? Uh-oh. The Joker is here and he's got his own plans for a super-powered sidekick! Someone hide all the crowbars, quick!