Batman: Arkham City is a sensational game, but we weren't the only people to be thoroughly bamboozled by the insane amount of pre-order and launch DLC. Luckily for us (and our wallets), Warner Bros. have handily decided to launch two DLC bundles that lump the content together into easy-to-handle packs.
The Arkham Bundle contains the Nightwing Bundle Pack, Robin Bundle Pack and the Arkham City Skins Pack. It's available for £9.99 on PC (GFWL), 1200 Microsoft Points on Xbox Live and will soon launch on the PSN for roughly the same price.
The Challenge Map Pack includes The Joker’s Carnival Challenge Map, the Iceberg Lounge Challenge Map and The Batcave (an Invisible Predator challenge map). It will set you back £1.99 on PC (GFWL) or 240 Microsoft Points on Xbox Live. The PSN version will cost around that much when it launches.
Frankly, Arkham City is big enough already... but these are great ways of getting your hands on the content without the hassle of downloading each one individually - and carries a slight BatSaving to boot.
Update: reader stevenjameshyde also points out that you can grab the Batman Inc. Batsuit skin for free on Xbox Live. Nice one!