UPDATE 19th April 2016 9.15am: Batman: Return to Arkham now has a PEGI listing.

PEGI, which age rates games in Europe, has a listing for Batman: Return to Arkham - Arkham Asylum on PlayStation 4, with a release date of 19th April 2016. This date, as Eurogamer revealed yesterday, is when pre-orders launch. The game isn't due out until June.

We expect a listing for Batman: Return to Arkham - Arkham City at some point, too, as the collection includes both games.

Not long now!

ORIGINAL STORY 18th April 2016: A Batman Arkham HD Collection has been leaked via a GameStop employee sending pictures of the unannounced anthology to Eurogamer.

As seen in the following picture, Batman Arkham HD Collection contains both Batman: Arkham Asylum and Batman: Arkham City along with all the DLC for both titles.

What the collection won't include, however, is Batman: Arkham Origins, which was made by Warner Brothers' Montreal studio. The rest of the series was helmed by Rocksteady.

Batman Arkham HD Collection is scheduled for a PS4 and Xbox One release on 10th June with pre-orders going live tomorrow.

We've requested comment from publisher Warner Bros. and will update should we hear back.