After the Justice League faces a horrifying incident on the planet Rann, Dick Grayson gathers an elite squad of heroes to shut down a meta-human trafficking syndicate in Markovia.
Alone on Christmas Eve, Harley reconnects with a now-sane Joker and heads to Wayne Tower, where their dinner is interrupted by an escaped Riddler and ParaDemons.
Harley and crew try to infiltrate Mr. Freeze’s lair only to become human lab rats for his experiments to find a cure for his cryogenically frozen wife, Nora.
The Autobots search for signs of each other, but start to lose hope while the Decepticons welcome a key player to their ranks. A win for Wheeljack may ultimately lead…