A downward spiral of rumors make prospects for the Justice League movie go from interesting idea to bad idea.
Source: Batman On Film
News trickling out for the Justice League movie might make fans wonder how, after Marvel provided a foolproof example of how to create a superhero team movie, someone could manage to screw that up. Early reports said DC planned to make a Justice League movie first and then branch the movies for each individual hero out of that. It was an interesting idea, as it would provide a reboot to Batman after Nolan's final Batman film and, perhaps, allow for a Green Lantern reboot as well. Though the steady build to Avengers from the various individual Marvel films helped to draw in fans and build interest, plus give many of the characters their own following as stand alone heroes, which was surely a major factor in its success, DC's iconic heroes might be able to get away with doing it in reverse, if they could avoid the pitfalls of creating another Green Lantern-like stinker, which would taint the value of all future spinoffs.
However, the Latest news hitting the net is that the Justice League movie will have nothing to do with the individual movies. In other words, Zach Snyder's Man of Steel may not necessarily be the Superman from the Justice League movie. If a new director comes along with their own take on Batman, that will stand seperately from the Batman in the Justice League. This method might have made sense years ago, when they first started work on a Justice League script, when Superman Returns and Nolan's Batman Begins were coming to our screens; but now, with the chance to reboot every hero across the board, it makes little sense.
According to Zach Snyder though, the idea still has traction:
We're not saying a Justice League movie that is stand-alone would be an automatic failure, but it would certainly be unambitious, passing on the chance to build multiple franchises and a shared shared universe, one of the things that helped Avengers become the third highest grossing movie of all time. Perhaps, if Man of Steel performs well at the box office, and with Batman in position for a fresh reboot, Warner execs will see the light and handle this the smart way. Sheah, right. And monkeys might fly out of my butt.
Perhaps DC just wants movie fans as confused about their continuity as their comic fans are. If nothing else, we have to praise their consistency.