Robert Pattinson's batsuit from 2022's The Batman briefly appeared in Batman: Arkham Knight yesterday, but has since been removed from the game. Fans flocked to social media when it was revealed that the suit had been implemented in a free update.
However, it seems that the suit's implementation was a mistake. According to the Batman Arkham Videos account on Twitter/X, the skin has removed from the game. Apparently, it wasn't meant to be released this early, but made its way out into the wilds anyway.
<social>https://twitter.com/arkhamvideos/status/1717612369591853364</social>
Current speculation points to it being introduced to the game once again, except at a later date. Right now, it seems most likely that the skin will drop alongside the Switch version of Batman: Arkham Knight and the other two Arkham games on the 1st of December. It seems that the Robert Pattinson skin will only be available on Batman: Arkham Knight though.