Rocksteady did not work on the PC version, so there is no way this is true.
only people that know for sure are WB, Rocksteady and Iron Galaxy...judging by the state of the game when it was first released it's fair to assume that the PC version was not ready...the PS4 version was flawless...the leaked e-mails or whatever from a former employee/beta tester detailing the major issues with the PC version also confirms this...the previous Arkham games had some issues but nothing like this...the game was definitely supposed to be released at a later date