If you haven't played Arkham City or Asylum and you only have a PS4 or an Xbox One... I'm afraid I have some bad news!
The game has been delayed. This sucks since the game was basically a PS4/XBOne GOTY versions of Asylum and City.
Now the delays are supposedly to make sure we get the best upgrades to the game and that is polished.
No release date on the horizon so now we wait... it better not get cancelled.