8. Jonathan Nolan
This one probably seems like an obvious choice. His writing credits include movies in the Dark Knight Trilogy, The Prestige, Memento, and the upcoming Interstellar... yeah, he kind of like's to hang out with his brother. On that note though, he's had a chance to hone his writing chops, and pick up some notes from the likes of his brother Christopher, and David Goyer. Experience is certainly a big factor, and Jonathan would be coming from a place where he knows what side is up. When the time comes that this universe is mapped out, and the screenplay is ordered, Nolan is going to have a real hand on what direction Justice League is going take. Aside from his work with his brother, he's also branched out on his own with Person of Interest on the small screen. There he teams up with action and sci-di great, J.J. Abrams. The show is filled with intense action scenes, great story arcs, and an ever growing cast. It's clear that he and the team behind the series are growing more and more confident with each passing season, and it may be time for the younger brother to step up to the plate and take on the Justice League of America!