Could All These Superman Easter Eggs Mean Rocksteady is Moving on to a Superman Game?

What's next for Rocksteady now that Arkham Knight is done?  Could it be a Superman series?  The video above shows a few Easter Eggs in Arkham Knight linking the Batman and Superman worlds, including posters for LexCorp and an answering machine message from Lex Luthor himself.  Rocksteady has stated that Arkham Knight is their last Batman game but that doesn't mean its their last DC superhero game.  What if Superman is next?  Or the whole Justice League?  Would you play a Rocksteady game about the Man of Steel?