1) Not Enough Set-Up
While, Marvel’s strategy in approaching The Avengers team-up may seem very overwhelming, it’s hard to deny that it’s very effective. By giving each of the main characters in their Avengers movie their own individual films, Marvel has eliminated a key problem with a team-up movie: the introduction of the characters.
In such a film, it’s important that all the big characters get the proper introduction and time on the screen. It keeps things interesting, and ensures that fans see the characters they most care about. The problem, is that in a 2 hour film, it’s hard to cram all of that in there.
To combat this, Marvel gave them all their own films. This makes sure that everyone is already aware of each of the main characters and their backgrounds, before thrusting them all together. This can save a lot of time, and allows them to jump right into The Avengers without a lot of set-up time.
This is a big concern for me, for this Justice League movie. Right now only 3 of their major characters in the JL will have a movie out by then: Man of Steel, Green Lantern, and Dark Kight Rises. While that’s not too bad, that still leaves Wonder Woman and the Flash as characters who need to be set-up within that film; more depending on how many main superheroes they throw in there. But even so, they really haven’t established those yet. I’ll explain next....
2) No Continuity Between Current Films
The current crop of DC films have feature no continuity between them. As far as they are concerned each hero film essentially exists in their own little universe, with no interaction between one another. Hell, when Christopher Nolan was still writing TDKR and just got the gig as producer on Man of Steel, he said in an interview that those two worlds (Superman and Batman) will not cross.
The same probably holds true for the Green Lantern movie as well, but there’s no telling with that one just yet. It’s another thing Marvel has done well. The many cameos they have within all of their films, is a great fan service and shows a connected universe that’s great for continuity. Essentially a Justice League movie would be starting from scratch with all of the characters.
But even if that weren’t the case, it’d still be much harder for people to swallow the concept, when in all of the films previous, none of the heroes even knew about each other. Throwing them all together now, and acting like it’s normal would be a stretch. It would take too much screen time to establish those links all within the one film as well (again, this goes back to point #1). Without the continuity other films could set-up, a Justice League movie could come off as feeling rushed, or ill thought out.
The last 3 reasons can be found over on the MoviePool site where the article stems from...