Imma calling this old man the "Key Master"

[Paco]

No it is. It's a secret ending you get at the end of KH2 Final Mix version. This isn't referring to the creator's other project he's been talking about recently.

It has some relation to other project...

Gemaga asked if the characters who appear in the new CG "secret movie" that has been added to Final Mix are from the new title. "They are people who have some relation to the new series," said the producer. "However the next title won't just be Kingdom Hearts III. If it were III, we wouldn't call it a new series."

Asked if Sora and Riku would make an appearance in the new game, he said with a laugh, "I can't say." He also hinted that the new game would have something to do with Xehanort, the main villain of the Kingdom Hearts series.

He was just as direct when Dengeki PlayStation asked for some details on the new title. "First, it's not Kingdom Hearts III. Of course, because we're calling it a 'new' series, it won't be KHIII. Also, it's a series, so it probably won't be just one title."

http://ps2.ign.com/articles/777/777832p1.html