7) Killer Croc
Poor Adewale Akinnuoye Agbaje is used to playing monstrous non-entities in superhero films by now, after previously portraying Malekith’s lackey Kurse in Thor: The Dark World. His Killer Croc isn’t as forgettable as Kurse, though, even if he is rather underused.
For one, the character surely only gets three or four lines in the whole film (and when he does speak his voice is more muffled than Bane’s). He very sparingly comments on his aptitude with sewers, predilection for eating people and his belief in his own beauty.
He’s not quite as formidable as she could have been (think the version from the Batman: Arkham games), but Croc fills his basic role as the big beastie of the team just fine. Like Katana, some exploring of his backstory next time around wouldn’t go amiss.