O-2D7 chimes in with some new scene details filmed in Ealing during the pickups in England a few months ago. Included are some additions to scenes previously discussed:

If you've read TFN very long, you're very familiar with the scene in the Geonosis arena that feels a bit like Gladiator. Don't worry about comparisons at this stage, it will be different enough that people won't be bothered by it.

A few things that may interest you that Lucasfilm reshot while they were in Ealing Studios for that scene and some 3PO details they shot the same day:

Anakin falls off the Reek at one time and is dragged. At one point instead of all three of them on top (Obi-Wan, Padme and Anakin) it is just the two of them and Anakin is being worked behind the beast.

C-3PO fire his weapon in the Geonosis Jedi Battle. We don't know much about this scene, though it is quite a departure from 3PO's normal behavior. Interestingly enough, there is a scene from R2's POV where he watches 3PO fire a droid's weapon. This was filmed on bluescreen and on the Geonosis City Padme set.

Great stuff - and most definitely not what I expected from the golden droid!