6. Oliver Queen, The Green Arrow
Aside from the big seven, Oliver Queen's Green Arrow is arguably the next most well-known member of the Justice League and, following on from the popularity of the Arrow TV show, it would be great to see him teaming up with the rest of the Justice League in a live action movie and starting off with a cameo could be a great idea. Queen could be introduced as a business rival to Bruce Wayne, appearing at a party or conference in a small role, just to let fans know that he exists in the DC Cinematic Universe. Of course, Queen also appeared in Smallville as part of their adaptation of the Justice League alongside the likes of Clark Kent, Bart Allen, Victor Stone and Arthur Curry, but a movie version would be great - and we know from the Avengers movie that a bow-and-arrow-wielding character can work alongside the big guns against a major threat.