In reality, Rocksteady never pitched or worked on a Superman game, according to people familiar with the company's strategy over the last decade. Following the release of Arkham Knight in 2015, the studio began working on a Batman VR game and then an unannounced multiplayer game set in an original franchise, which has not been previously reported.
At the end of 2016, a Suicide Squad game at the Warner Bros. studio in Montreal was canceled, and the property was subsequently given to Rocksteady, which began working on the current iteration in 2017.