According to reports, 'Superman' comic book villain 'Mr. Mxyzptlk' will make his live action debut on "Supergirl" in 2017:
'Mister Mxyzptlk' (pronounced 'mix-yez-pittle-ik'), is a fifth dimensional 'imp' that has plagued DC superheroes in comic books since 1944 and has since appeared in TV series, animation and video games.
'Mxy' debuted in "Superman" #30 (September 1944), originally presented as an imp from the 'fifth dimension', not being bound by physical laws.
Mxyztplk had designs on conquering the planet, but soon settled on tormenting Superman, with his only weaknesses that he cannot stand being ridiculed and if he says or spells his name backwards, is involuntarily sent back to his home dimension.
Though easily one of the most powerful of DC's super-villains, Mxyzptlk is mainly a shit-disturbing prankster who prefers to use his power for childish antics and harassment rather than malicious evil.
Mxyzptlk is also protective of Superman because, in his opinion, Superman's generally serious demeanor makes him an exceptionally entertaining target.
Though the exact limits of Mr. Mxyzptlk's powers are unknown...
...his powers apparently dwarf other dimensional cosmic beings.
Click the images to enlarge and Sneak Peek 'Mister Mxyzptlk'...