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Batman: Arkham City DLC revealed

All new Batcave! Joker's Carnival! Iceberg Lounge!

New Batman: Arkham City downloadable content launches on 20th December, Rocksteady has announced.

That's a Tuesday - we expect the DLC to launch on the European PlayStation Store on Wednesday, 21st December.

It brings an "all new" Batcave, the London-based developer revealed on its Twitter page.

The Joker's Carnival and Iceberg Lounge challenge maps will be available to download then, too.

The Joker's Carnival challenge map was a pre-order bonus exclusive to UK supermarket Tesco.

It is a separate set of missions based inside Joker's hideout. It's estimated to add four hours of additional gameplay.

The Iceberg Lounge is a Gotham City nightclub, and the base of operations for the Penguin.