Spawn

Spawn was a popular comic book anti-hero during the 1990s, so they made a movie about him with Michael Jay White in the starring role. It was battered both by critics and at the box office, but we’re fairly sure that it wasn't because of how it was rated.

Let's be clear, a movie about a hellspawn should be rated R, and the 1997 film did have such a rating (Yeah, the main antagonist was also called Violator, so go figure).

Creator Todd McFarlane has said more than once that a movie would be made. There were indeed talks about a sequel in 1998, and a reboot was planned in 2007. Most recently, McFarlane reiterated that Spawn would happen and it would be a hard R.

Will it happen, though? We’re asking because, well, there must be a reason for its 10-year wait in development hell. It will probably be made, and it will definitely be rated R. As Logan and Deadpool have demonstrated, R-rated comic book movies can work very well, both critically and at the box office.