DC Entertainment and Warner Bros are following Marvel Studios in terms of establishing their own shared cinematic universe of superheroes. However, they intend to chart their own separate course in doing so.
Unlike Marvel, where the studio released standalone films for Iron Man, Thor, Captain America, etc first before bringing them all together for The Avengers, DC and Warner seem to be doing it the other way round as explained by Batman v Superman director Zack Snyder in his recent interview.
"What we are doing is ground up all the way. It is one giant story," director Zack Snyder tells Empire Magazine. "The first thing we had was the Justice League concept. The other movies, in a way, have to support that. That is our Wonder Woman, our Aquaman. They have their own creative concepts that supports them, but they do serve Justice League in the coming together of those heroes." (via ComicBookMovie)
Snyder also stated that the individual filmmakers in charge of the standalone films will not be entirely restricted and will have complete creative freedom to make their films the way they intend to. However, the director did add that he will be keeping a close eye on them:
"I want all the other directors of the other films to be able to stretch their legs and do what they want, but at the same time there is a big interconnected universe. I have given everyone amazing access to our story, to me, and what we are doing. All the films have like minded conceptual jumping on points."
Snyder wasn't willing to get into specifics, but he did tease what the magazine describes as an "elusive" cameo for Aquaman in Dawn Of Justice by promising only that, "You will understand he exists."
Batman v Superman: Dawn Of Justice opens in theatres on 25 March 2016 and The Justice League Part One is slated to release on 17 November 2017.