So no Injustice Gang or Legion of Doom movie coming. This is one of the reasons why Warner Bros/DC suck. They give up after one failure instead of moving on or trying to improve in the sequel. Focus will be on standalone films from now on. I like it when the solo films focus primarily on just their main character, and not cameos and introducing other DC (or Marvel) characters. But a movie with the Justice League facing off the Legion of Doom would have been huge as long as they didn't give it a "Justice League" title in the movie, that might have worked...but my point is also that Marvel has never done anything like that, so that door is still open. They better dot hat before Marvel beats them to it.
The Avengers have only really battled a one army man. Loki had the tritari (or whatever it was called), Ultron had...Ultrons. Thanos and a few sidekicks.
But in a movie with Luthor, and another Superman villain, Cheetah, Joker, Black Manta, Grodd maybe, Reverse-Flash, and Sinestro would be epic. When you have a team of iconic heroes and villains battle, it's a combo event.
Only 3 films set to be released by DC, and it doesn't look very good.