I disagree. Last thing I want to do is assault the Death Star as Sora, or destroy an AT-AT on Hoth with Sora. I wouldn't mind Jar Jar being a summons, but other than that, I think Nomura should drop the idea.

Oh god please no, Star Wars is not a Disney creation in the first place and would be weird if placed in just so that they can do a 'lightsaber keyblade'. Focus on classic disney worlds, but if the SW world does happen I at least hope its optional and non-canon like Pride Lands and Atlantica were optional in KH2.

Not really... :)