The Squad DLC pack (not the greatest name, but mentioning Suicide in a kid's game was presumably frowned upon) will feature such anti-heroes and straight-up villains as Deadshot, Deathstroke, Harley Quinn, and Captain Boomerang.
There's also a new story mission. It will be interesting to see how Traveller's Tales manages to make the violent, anarchic feel of the comic even slightly kid-friendly. Presumablywon't start chewing peoples limbs off.
“In The Squad add-on content pack,” reads the plot synopsis, “a mysterious figure has infiltrated Belle Reve Penitentiary, and it’s up to players to smash their way through the prison as Deadshot, Deathstroke, Harley Quinn, Captain Boomerang and other members of The Squad to hunt down this infiltrator before Amanda Waller's—and The Squad’s—secrets are uncovered.”
Along with about four million other packs, this DLC will be included in the LEGO Batman 3 Season Pass. You can buy that for £11.99, or get each seperate pack for £2.50.
LEGO Batman 3: Beyond Gotham is out now, and The Squad DLC drops in early 2015.