Either those bonus discs are going to be a real waste of storage space, or we’re getting a considerable amount of bonus content for the OT and PT that wasn’t on the complete Bluray set, which had just three bonus discs for the six films. The ST stuff will just be the same stuff that came with their recent Bluray releases, I imagine.
I didn’t look too deep into the Blu-Ray bonus features, but the one feature I did watch about Star Wars parodies turned out to be a lazy compilation of Star Wars references in sitcoms and whatnot, the likes of which one could easily find on YouTube and is not worth my time. Clearly they were stretching it thin already, so what more could they possibly have to add? The only things I can think of are the ones we’re probably never gonna get (unaltered OT and TRoS deleted scenes).