Wow, now this thread has made me sad. Mostly because it made me realize that what I thought was one of the themes that Disney could use, which would mesh really well with the Lucasfilm cue (though not as well as the Fox fanfare) was actually the Dreamworks logo theme.
Just trade out that last little Guitar bit for the same notes in horns (which I'm pretty sure one version of the logo does), and you'd be in business.