I remember some Howie Long Special where there is probably just a second of footage showing the washing of the original film.

But mostly was useless hype.

I believe the anatomy of a dewback will be on the blu ray, time to wait and see if part 2 is altered that proves Lucas saves all his films and their related materials.

Then you could get that making magic CD thing Fanfiltration converted, or get babyhums special edition press kit.

Probably both fall under the hype and non essentials though.