Yeah, this is what I've been waiting for since 1983. No, scratch that, since 1977. My hopes have been fairly dashed with the PT so far, but everything presented to us so far on ROTS has me getting really, really excited again. November 4 can't come quick enough.
I'm hoping to see a few things in the teaser:
Clone ARC Fighters
On the flip side I hope they don't beat the final duel into the ground. I'd like them to simply elude to it (and give me a sneak to the planet design) and save the meat of it for reveal in the actual movie. I've seen too much Obi/Anakin punchin' an' kickin' already and want it fresh for May.