Before I begin my main topic, I'd like to give my answer to the question that's been hitting fan boys since last night: Can a Justice League movie be a success so soon, without even films on Wonder Woman, Flash, Aquaman, etc. being out yet? I believe, as many do, that 2013 sounds way too soon. I was thinking that 2014 at least would be a good year. Despite this, I'd like to point out that many DC properties (Flash, Aquaman, Green Arrow, etc.) aren't near as well known as Superman or Batman, so can they carry their own films without being previously displayed on the big screen with heavyweights? I'm thinking that a JLA film before Flash, Green Arrow, etc. might work better because it can introduce the general public to these characters. Many would pay to see Superman or Batman on the big screen, and would DEFINITELY pay big bucks to see just those two together. That said, I believe that a JLA film would be a success merely based on Supes and Bats' popularity, especially if it's Nolan's Batman.
Which brings me to my original topic: Should Batman be reinvented after The Dark Knight Rises? I think a Batman reboot will always be inevitable, but I'd say wait 7-10 years at least before releasing one. It's a fan boy's dream to see the current Batman team up with other Justice League members in an all-out action packed film. Why fix what isn't broken? I recently read that one of the reasons a Justice League movie was canceled in 2008 was because of their using a different version of Batman while Nolan's Batman saga was breaking box office records. With The Dark Knight Rises coming out in 2012 and supposedly Justice League a year later, it sounds sort of like deja vu to me. To sum it up in a nut shell: bring Christian Bale back into the Batsuit. Even if that means paying Nolan a heck of a lot of $$$ so he can direct it...or at least be involved somehow.
As we all know, The Avengers is doing something never seen before in CBMs: crossing over various films/film series into one epic film. From what everyone's been saying concerning the script, it looks to be a HUGE success, more likely with the critics. I've always believed that, after Avengers, Warner Bros. will be so interested in rivaling Marvel, that they would obviously do the same thing with their DC properties. Adding to the first paragraph, I'm confident that a JLA movie will make much more money than Avengers, based on only Batman and Superman. None of the Avengers (unless you count Spider-Man, a New Avenger member) are near as popular.
Finally, I'd like to address whether or not there should be cameos in future movies (like TDKR, Man Of Steel, etc). I saw someone mention that Bruce Wayne could be interviewed by Clark Kent at the end of MOS, and I believe things like this would make wonderful easter eggs to a JLA film. I also believe that the Superman cameo edited from the Green Lantern script should've stayed in there.
Well, that's what I have for now. Feel free to shout our your opinion(s) in the comments below. Guess we'll see how this movie moves forward within the next few months or so.