First appearance: Thor #411 (1989)
As just another vigilante in some fancy armor, Marvel’s Night Thrasher is about as generic as they come. Sure, he’s adept in hand-to-hand combat, and he’s about as agile as any feline out there, but you need more than that to make the jump to film. There's no important story arc to speak of for the character, which would make any potential movie lack the punch that it needs.
Night Thrasher became most notable in the comics as a member of the New Warriors, a team of misfits that couldn’t even lace the Avengers’ boots. Thus, he's the perfect example of a hero who isn't ready for prime time.