7. Justice League
I don't think this one warrants a whole lot of explanation. Green Lantern was a disaster, plans to get a Wonder Woman film off the ground have stalled for like a decade, and an Aquaman film has no commercial viability whatsoever. Furthermore, with Christopher Nolan's Batman saga played out, it all comes down to Superman, specifically Zack Snyder's Man of Steel, to save the day; whether a Justice League movie will ever get made depends entirely on how well Snyder's film does, and if it posts only modest box office reciepts, don't expect this one to be rushing into production anytime soon. It's another film that studios have tried to put together for years, and with the enormous success of The Avengers, that task has taken on an all-new urgency. However, Warner must remember that the Marvel Cinematic Universe was carefully built up over a period of four years, whereas the prospects for DC films seem rather uneasy at the moment. If this one is ever made, I will be absolutely amazed. There's probably only one person who could turn it around at this stage - Christopher Nolan (who has been rumoured to be producing it).