There's no way Hollywood can render a movie superhero who look exactly like the comic book original, because people aren't drawn that way. But some of them are pretty darn close, especially the better-known characters like Superman and Batman. Others go through quite a few changes moving into the world of live-action fim. Aquaman seriously needed a makeover, considering his reputation as a lame comic book superhero, and they did him right by casting Jason Momoa in the role. See how other comic book superheroes were changed (or not) for their live-action movie versions at TVOM.
Actually New 52 Aquaman was a serious makeover and was widely regarded as pretty badass. Likewise the adventure Aquaman used in the Batman: The Brave and the Bold was probably that series breakout character.
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