So yeah... Convergence issue 1 actually opens with Injustice Supes, Bats, Flash, Cyborg, and Harley. And the most interesting part, I think? It takes place after the game. Unfortunately there's like zero character development/story going on there and it's literally a "hey look we used these characters once" type of deal.

To be honest though Superman's outfit being under his prison uniform is super cheesy.