Apparently, Warner Bros. liked what the screenwriter of Batman v Superman: Dawn of Justice did so much that they want to hire him to write Justice League as well. The writer's name is Chris Terrio, and he also wrote Ben Affleck's Argo, which had a fantastic script. The guy is obviously talented, and it gives me hope that Batman v Superman will be much better than Man of Steel. After the footage that I saw yesterday my excitement level for this film has shot up tremendously.
If makes complete sense that they would want to hire him, especially since he's already engulfed himself in that DC cinematic universe. He knows the characters, settings, and story, and he basically helped in the process of developing this universe.