Warner Bros. wants their own Avengers, so making a Justice League film seems like the obvious route to take. But since Marvel has already gone that rout, wouldn't it be wiser for Warner to do something different--like the Outsiders?
Having an all street-level team differentiates Warner from Disney, lowers the cost of the film, and has less of a chance of ruining major franchises. It's also easier to appease Outsiders fans than Justice League fans because Outsiders fans are smaller. You don't have to worry about rabid fanbases like Wonder Woman's or heavily divided ones like Green Lantern's. Plus you get to keep all of that Batman box office if you call it Batan and the Outsiders.
The team is pretty diverse and could spin off their own films that are just as likely to take off as the Justice League ones.
This will never happen, and I nkow I'm posting in the Justice League forum, but please don't flame here. This is for peaceful, respectful dialogue.