To my knowledge, this is about preserving first and foremost the laserdiscs in the highest quality possible. To that end, no, there would not be, as none of the laserdiscs had more than a stereo track.

The project's second goal is to preserve the theatrical experience as much as possible from the highest-quality laserdisc sources available. On this side, unless someone were to have access to the six-track 70mm mix (which would end up being 4.1, not 5.1), the best you'll get is the theatrical stereo mix and the theatrical mono mix.

Now I'm sure someone will take this source material and combine it with a surround mix a la MeBeJedi's experiment with it a while back. So it'll probably happen, you just might have to wait a while. Of course, I'm not a member of the X0 team, so I could be wrong about all this, but this is my understanding of the project.