Even the Caped Crusader isn't immune from season passes and premium editions. WBIE just revealed that there will be a Season Pass and Premium Edition for Batman: Arkham Knight.
Warner Bros. Interactive Entertainment and DC Entertainment today announced the Season Pass and Premium Edition for Batman: Arkham Knight, the epic conclusion to the award-winning Arkham trilogy from Rocksteady Studios. Both the Batman: Arkham Knight Season Pass and Batman: Arkham Knight Premium Edition are now available for pre-order from participating retailers. The Season Pass is priced at £32.99 and the Premium Edition, which includes both the Season Pass and the main game, is priced at £87.98 for console, and £67.98 for PC.

The Batman: Arkham Knight Season Pass will deliver regular new content for six months post-launch including new story missions, additional super-villains invading Gotham City, legendary Batmobile skins, advanced challenge maps, alternative character skins, and new drivable race tracks. The Batman: Arkham Knight Premium Edition includes the main game and the Season Pass.

£32.99 converted to USD is about $50. £87.98 converted to USD is about $135. £67.98 converted to USD is about $104. What I'm hearing is that the actual cost of the Season Pass in the States will be $40 (USD). If you're not too keen on picking the game up right at release, you may as well wait for the inevitable GOTY edition to come out if these prices stick.