But oke just to ad something more to this comment:
For the love of God NO! Just because it does this doesn't automaticly mean YES to the other one next we are gonna discuss that KH4 or KH5 should have the DC Universe with a Batman World in it were Batman teams up with Donald and Goofy to take down Joker if Disney is ever going to buy DC (the chance that will happen is really small but it's a example).
If the Jedi and Sith appear in KH these are just a few questions I will have:
-Where were you guys during the Keyblade war? your kind has been in existence for centuries no thousands of years so where were you all this time?
-How long do you guys exist?
-Why haven't you been mentioned before with your Death Star that can blow up planets ALSO Star Wars is so big the only way I can see this happen if they make just one rebel planned (because the Empire cannot control one planet they destroy it... Are there more planets than one? how many worlds do they own in the Kingdom Hearts Universe? will they let Palpatine blow up a Disney World... Nah but for real though the questions?)
-Who build the Death Star because does the Senate exist in the KH Universe?
-How will the family theme's work with KH because KH is always focused on friendship so... Sora is gonna meddle in Luke's family issues
Rik: Yeah I stay out of your dad issues (basicly HARD translation from DDD).
For whatever reason people try to defend this they say ''Nomura can change this and that'' and that is a problem! most of the Disney World's in Kingdom Hearts FIT the overall tone of the series or absolute fit the characters personality's! The World's are small and can't change the universe but Star Wars on the other hand.
Even if you find another way IF SO MANY PEOPLE hate the idea, are against the idea or split than it shouldn't be done.
I don't know much about Marvel and all but I get the feeling that people that keep asking this care more about visting their favorite movie than the actual story, lore and overall feel of the franchise.