3) Mr. Mxyzptlk
The most infamously bonkers character from Superman lore in the Golden Age is Mr. Mxyzptlk.
Similar to Bat-Mite, he is an inter-dimensional impish character with reality-warping powers. Unlike the little guy who is Batman’s biggest fan, however, Myxp… Mxyp… this fella is a fully-fledged villain, who enjoys tormenting Superman.
If played straight and given a visual revamp, Mxy could be a formidable villain for Henry Cavill’s Supes – an all-powerful creature that exists on different planes would be a hard one to defeat. However, the character also comes with a ridiculous in-built off-switch – he can be stopped if he is tricked into saying his own name backwards.
Superman fans might have a soft spot for the character, as he represents the endearing wackier side of the character’s history, but there isn’t much hope of seeing that impossible-to-pronounce name in the credits of a movie.