Batman Arkham Knight: The Official Novelization releases on the 7th of July, which is a little over a month when compared to the launch date of the videogame (on the 2nd of June).
Rocksteady Studios has already stated that Batman Arkham Knight will be the last game in the saga. It takes place after Arkham City as Batman returns to Gotham City to find several adversaries waiting for him. The city has also been abandoned due to a bio attack leaving only criminals and the policy force. Hopefully, the official novelization should further flesh out the plot even after you played the videogame to death.
The game is coming to the current-gen consoles (PlayStation 4 and Xbox One) plus the PC platform. The exclusion of the Batmobile meant that it won’t be heading to the Xbox 360, PlayStation 3 and Nintendo Wii U.