For those who have no idea who I'm talking about, she's the main antagonist of Disney's 2010 hit animated feature Tangled. And, since a world based on this film has been confirmed to appear in KH3, she will undoubtedly appear in Corona's Kingdom (or whetever Rapunzel's world will be called) in KH3 as the main antagonist.
Now, let's get to the point of this thread. Think about it for a second: as Flynn Rider told us in the prologue of the movie, Mother Gothel has been selfishly using the Golden Flower's magical healing power for HUNDREDS OF YEARS (he doesn't say exactly how many years, but many fans speculate it's about 400/500 years) and became completely overprotective of this item to the point of kidnapping an infant Rapunzel, isolating themselves in a tower and raising the girl as her own daughter only to abuse the magical power of Rapunzel's hair. Now, there is a reason why I highlighted and caps-locked the words "HUNDREDS OF YEARS". Why I did this, you may ask yourselves? It's simple. The answer is quite simple, with three words: The Keyblade War.
Since this old lady has been living for so many (hundreds of) years, Master Xehanort (and/or any of his 12 vessels) will probably visit this world to ask her if she knows anything about The Keyblade War (which, in my opinion, she surely has heard some stuff about it, considering how old she is).
Anyway, let me hear your opinions, please.