The Chris Cason "anti q&a" panel does seem interesting. I had a chance to see it last weekend, but it ran against closing ceremonies* and unlike @ matsuricon 2011 I wasn't able to stay that long.
A sabat panel could be awesome, especially with the potential for a Piccolo showdown. Only thing.cooler and would be a Vegeta brawl.
The cons at which I've seen sabat have, tragically, been ones that believe that outside of q&a panels and autograph lines, guests should be neither heard nor seen (I say that tongue-in-cheek, I've spoken with their guest chair who told me that they didn't prioritize guests for years and are now shifting gears, but progress is slow). Point being that a non q&a sabat panel would be a new, and potentially awesome, experience for me.
*why are opening ceremonies generally held hours and hours after the con opens but closing ceremonies are almost always the absolute last event at the con?