It seems that Batman: Return to Arkham, the rumoured HD collection, might just have been confirmed by a listing on the European ratings board.
Eurogamer initially reported on how a GameStop employee leaked images of a yet to be announced anthology. The collection is said to contain Batman: Arkham Asylum, Batman: Arkham City and all the released DLC for both titles. The leaked info also indicated that the Collection would release sometime in June 2016.
This is one HD Collection that I am personally really excited about should the rumour prove to be true.