The comedic modern-day quintet takes on their 2003 counterparts when villains from each of their worlds join forces to pit the two Titan teams against each other. They'll need to set aside their differences and work together to combat Trigon, Hexagon, Santa Claus (that's right, Santa!) and time itself in order to save the multiverse.

Robin is sent by Batman to work with the Teen Titans after his volatile behavior botches up a Justice League mission. The Titans must then step up to face Trigon after he possesses the League and threatens to conquer the world.