Spot1990 said:
Do not make it an origins story. Avengers taught us something, comic logic can work in films. Comic books and superhero cartoons did not feel the need to start with an origins story. Lots of films do this. That's the thing about sci-fi/fantasy, we already know the normal rules don't apply. When we watch Star Wars we didn't need to know how and why the force worked even if they did decide to tell us. When watching LOTR we didn't need to know why there was Hobbits and shit. All we need to know for a superhero movie is "Some people have superpowers." We don't need to know why. X-Men didn't feel the need to be an origins story. Sure we got Rogue's origin but the rest was just "Here's a school full of people with super powers. Right, now shit's gonna go down. This guy shoots lasers from his eyes, she's psychic, she controls the weather. Right, let's go."
I like this idea, if they aren't going to create at least one movie per character and then bring them all together like the Avengers they should just start in medias res (If you'll excuse the use of one of the three latin phrases I know and use to make me sound intellectual and high society.)
Hey, they could even do introductory viral marketing videos like the "meet the" series for TF2, although there's no way you could pull that off without it looking like one of those super cheesy dating videos.
Just have as the introduction a fast paced fight between all the Justice League that they are using and one of the super villains, that showcases each persons power, strengths and maybe a few weaknesses. Then when they defeat the villain he could tell them of the much greater evil that is coming. Cue rest of movie. Or it could be about the rest of the Superpowered heroes already having a Justice League, and them accepting Batman into it, which would be controversial since he isn't actually superpowered, so it'd be up to him to prove his worth. Then throughout the film we see Batman's analytical skills come into play as he overcompensates like crazy just to stay alive while fighting with the league, eventually his detective skills save the day, finding a weakness in the villain which the other heroes can exploit and the day is saved. Batman is formally invited to join the Justice League, but declines, because he is needed more in Gotham, but says if they ever need him again just to give him a call.
BOOM! There's your movie script, and it's doable without messing with the power levels too much or cloaking Batman in so much plot armour he may as well be in the Ship with 6000 hulls, because the point of the movie is that he is trying to compete with people out of his league, and so has to rely on his wit, instinct, and being crazy prepared for everything. Well I like it.