5. Justice League (TBD)
Though DC is currently hesitant about green lighting their Justice League film (most likely waiting until they see the result of 2015's Batman/Superman film), it's an inevitable project that will undoubtedly make the studio very rich when it's released. Batman is a box office juggernaut, with Superman not far behind, so combining them along with the rest of the JLA will absolutely draw audiences to the theater. The big question is whether or not it will approach the same level of success that Marvel has seen with
their shared cinematic universe. Again, only time will tell, but when you consider how long fans have been waiting to see the Justice League on film, I wouldn't bet against it.