You mentioned Gate how about Bill Gates and a exclusive title equivalent to the launch of his next generation system (720). This will provide funding and insurance of the success of their launch. Kick A** game to push their cutting edge system thats worth the effort. No volleyball games, and pikmin to push the system,
It would never happen, and wouldn't make sense for either Bethesda, Bioware, or Microsoft.
First of all Bioware is trying to increase their TOR subscribers. Letting someone else make a Star Wars RPG would cannibalize their market. Secondly, people dedicated to TOR would not be likely to jump to a KOTOR game, especially considering someone else would be making it.
It's a pipe dream. It may sound good in your head, but game companies are businesses first and foremost.