A special super edition with 3 discs, one containing the theatrical cut the others the DE and the ELV. A 4th disc will contain bonus features. In addition the movie will be fully recut from original camera negative and the visual effects rebuilt from the original VFX Elements. The DE will have its new visual effects remade in HD by ILM.
I would absolutely love to have something like that.
But would it actually require three discs? The Blu-Ray version of Close Encounters of the Third Kind
manages to fit all three versions of that film onto one disc. Wouldn't seamless branching work just as well for TMP as it did for CE3K?