It appears the next Arkham game is finally coming after 4+ years of waiting. WB Montreal was supposedly working on a mysterious game and it seems that with tweets and hints ...its gonna be involving Batman facing the Court of Owls. The game from what is being rumored will be like Origins and be set back in the early days when Bruce Wayne is Batman.
https://screenrant.com/batman-court-owls-game/
But the wait seems to be nearing an end and we will finally get the next Batman game. I personally can't wait and hopefully the Batmobile part is slimmed down. lol