Warner Bros Suspends Sales of Batman: Arkham Knight PC Version
The suspension is likely happening due to many, many technical issues with the port: http://kotaku.com/batman-arkham-knights-pc-version-is-a-mess...The average rating for the game on Steam was 31%. Since this was the first AAA game to be released on Steam after the release of Steam Refunds, it's also suspected that a high number of returns could force drastic action.