WB has wanted to make a Suicide Squad game for over a decade now, that's why in 2010 they created their WB Montreal studio with this purpose. Arkham Origins was conceived as a mean for the studio to staff up and prepare for the development of their Suicide Squad title which, by the time the Batman game released, has already been in preproduction for a while - that's why it was teased at the end of Origins.
Meanwhile, another group within WB Montreal pitched several Superman games to WB between 2014 and early 2015. None of those pitches were greenlighted by WB executives. Then in summer of 2015 - and while the Borderlands-esque Suicide Squad game continued production by a separate team - a Batman game starring Damian Wayne - sort of a sequel to Arkham Knight - was approved and entered development at the studio.
Around this time, Rocksteady just wrapped up Arkham Knight and the team split up in order to provide support to WB Montreal in the development of their Suicide Squad game and also work on Knight's season pass content, PSVR's launch title Arkham VR and their next big project: a Superman game - which they teased heavily across all of Arkham Knight.
Then in 2016 some major management shakeups started to happen at WB Montreal and late into the year, they cancelled Suicide Squad and postponed the reveal of Damian Wayne's Batman game - planned for that year's Game Awards ceremony. The game would be canned shortly after as the studio started to work on an entirely new Batman game, Gotham Knights, set in an entirely new continuity shared by all of the upcoming DC games.
2016 was a troublesome year for Rocksteady as well. Their Superman game would be cancelled and, given how they were working alongside WB Montreal on the Suicide Squad game, this is when they took over the project and fully revamped it into the next-gen Suicide Squad game that's being discussed in this very thread.
Not so long ago, a new Superman game was greenlighted at WB Montreal - although it seems to be in early stages compared to Gotham Knights or Suicide Squad: Kill the Justice League. Thanks to the SSDs and the power of next-gen consoles, I think that this is the perfect time for the game to come out - so to all the Superman and DC fans out there, don't worry, the future looks pretty damn bright.
www.eurogamer.net