Posting on the WB Games forum, a company representative said the delay is intended to give Virtuous Games, the development team remastering Arkham Asylum and Arkham City for Xbox One and PlayStation 4, more time.
"After reviewing the progress of the project, the team at WB Games has decided to delay the release of Batman: Return to Arkham to give the team at Virtuous Games additional time to deliver a polished Batman Arkham game experience," reads the statement.
"We do not have a release date yet and will be sure to communicate that once we are sure the game will be ready. We know this is disappointing news, but we feel the extra time will allow the team to create the best gaming experience for our fans."
Following multiple leaks, Batman: Return to Arkham was officially announced in May. In addition to the base games, players will receive all Game of the Year extras and downloadable content. Overall, Warner Bros. said players can expect "improved graphics" and "upgraded models, environments, lighting, effects, and shaders."
While the original games were powered by the Unreal Engine 3, the remasters are being developed by Virtuous using Unreal Engine 4.
Take a look at this Batman: Return to Arkham screenshot comparison gallery to see some of the visual differences between the old and new versions of Rocksteady's games. These comparison shots are not official, and we compiled by a fan.
from GameSpot http://www.gamespot.com/articles/batman-return-to-arkham-doesnt-have-a-release-date/1100-6441302/