Just to get into the festive spirit of Christmas, anyone remember Mickey's Christmas Carol?
Here is a story concept and idea (even though its not the best) I had if they ever do put a Mickey's Christmas Carol universe in Kingdom Hearts:
Sora, Donald and Goofy ended up working under Ebenezer Scrooge who like the adaption is a greedy miser who despises anything associated with Christmas. The gang could see Ebenezer's temper flare up whenever anyone mentioned the term "Christmas." At the same time, they met Bob Cratchet, an employee who works under Scrooge along with Cloud Strife and Tifa Lockheart who were both hired by Ebenezer Scrooge to work as couriers (similar to Advent Children.)
After the three were docked half a day's pay so that they can spend the Christmas Day off, Sora and the gang felt really sorry to the three and decided to assist Cratchet, Cloud and Tifa with a variety of objectives and tasks which include delivering packages and help Cratchet out. Soon, they learned a lot more about Ebenezer's past from Cratchet and the townspeople. Later in the evening, they could see Ebenezer Scrooge frantically running away from the heartless who seem to be a primary target in which Sora and the gang were able to annihilate.
When asked about why the heartless were pursuing him, Scrooge heard a strange voice that sounded like Jacob Marley (his former employee who is deceased) warning him about three spirits that will come to punish him for his greedy ways during the evening. Frightened, he requested Sora and the gang to stay at his home to act as his bodyguards in which although hesitant, decided to help Scrooge for the night.
As evening struck, the Ghost of Christmas Past (Jiminy Cricket) and Ghost of Christmas Present (Willie the Giant) showed up and took Scrooge along with Sora and the gang to revisited his past and present life which all of a sudden the heartless began to show up and wreak chaos amongst the events in which were defeated. They then met the Ghost of Christmas Future and after viewing the events on what occured, where they found out that Marley's voice was nothing but a ruse setted up by no-one other than Pete who was the culprit behind the scenes. Pete then summoned a giant fiery heartless monster to support him in the final battle.
After a long fought battle in which Sora and the gang were victorious and saving Scrooge who was almost taken in by the fiery depths of his own grave (similar to the animated feature), they then see a path of light shining ahead in which Scrooge, Sora and the gang walked through. By then, all of them woke up and realised that it was Christmas morning and everyone were in to the festive spirit which included Scrooge who vowed to make amends. Sora and the gang assisted Scrooge by donating presents to the poor. After accomplishing all the tasks, they then went to visit Cratchet's house and together celebrated Christmas.