A free downloadable content pack for Gotham City Impostors is available now on the Xbox LIVE Marketplace for Xbox 360, with similar content packs available for PlayStation 3 and Windows PC in the near future. The download includes a match-making update which should make connecting to other players easier as it allows you to join a match in progress, as well as new maps and costumes: The 25th Floor map, the Kingmaker and Falcon Blade weapons, the Toxic Gas Support Item, and a new Fun Fact are all available right now!
Check out the latest trailer which coincides with this DLC: