The rough draft idea I have is Toyman catching Santa in a trap and steals his sleigh, list, and bag of toys. He adds his own explosive toys to the bag and finally gets his revenge on Walter Dunhill by blowing him up and leaving a lump of coal behind. The incident is reported on the global news causing people around the world to believe in Santa but lose the belief in his goodness(which causes the real one to weaken even further).

His next target is Thor in Metropolis. So the heroes have to gather to stop this fake Santa, save Christmas by delivering the real toys, and save Santa. Santa then gives the heroes(including the ones that were unable to participate in the event) one special gift. You all can comment or message what you want the gift to be.