Maybe its a "fixed" version of the previous DVD set, with the stupid mistakes they made fixed, such as the reversed sound channels, Luke's saber not green in the Falcon, etc. Hopefully it isn't yet another SE release, with still more changes.
Its probably just a cheap repackaging of the previous release to cash in on ROTS coming to DVD shortly before that. But we can always hope it is the O-OT. But I wouldn't hold my breath.