Nah, the conveyor belt stuff just came from descriptions of the shoot on the floating platforms, which involved Hayden circling Ewan on a track.
There was never any "droid foundry" type scene scripted or shot - Pablo confirmed this in the Q and A.
I've checked all reference material I have available, and I see no record of this scene where "Obi is conversing with Ani as he repeatedly strikes him".
You have to understand any early description of the length of the duel was based on how much raw footage was captured and looked likely to make the final edit.
It is just a rough estimate.
This - as with all scenes in all movies - was then reduced until a satisfactory edit was achieved.
But just because the duel went down in length, does not mean whole scenes were dropped - more likely shots within scenes were trimmed.
It is possible some duel footage may make the DVD Extras - but my guess is it would be more of an extended or alternative scene(s) rather than a totally new scene(s).
Besides which, I personally would much rather see stuff we have seen nothing of rather than extensions of things we did see.
Some of the political stuff is a definite, but Shaak-Ti's death, the digitally rendered Dagobah, the fuel room, the Nos Monster would all rank above more duel footage for me...