I thought when the 6" line was originally starting up, it was mentioned (even by Hasbro?) that the line would maintain a 3 to 1 ratio of OT/PT. Then again, now we're down to 3 new figures per wave, so who knows.
As for Toy Fair, I think it could be an interesting year, depending on how chatty Hasbro will be about the future. I'm a little concerned that many retailers don't seem to be carrying/ordering the 3 3/4" Black Series, and we still haven't seen preorders even go up for the Dagobah Luke wave. So, I'm most interested to see what will be revealed for that line - but like others have said I could see more focus on Rebels, 6" Black Series, and Angry Birds (and Marvel/Transformers/etc. with those movies this year).
Realistically, I hope we see the next couple waves of 6" figures (or one wave beyond Bespin Luke), the next wave after the Dagobah/Empire wave of 3 3/4" Black Series, and a nice preview of Rebels (maybe 7-10 figures and a vehicle or two?). I think many of us are most interested in the state of the line at this point, and what we'll see this year overall. I just wonder if superarticulated (or just, articulated) 3 3/4" figures are going to continue on, or if we'll see more of a Marvel approach of 6" Collector figures and 3 3/4", 5 POA action figures. Then again, if you look at the Cap movie line, they have the 6" collector figures and a smaller wave (four figures I think) of the smaller scale stuff, but I think the figures themselves are pretty nice. If Star Wars got the same conservative approach, but kept up the articulation/detail along those lines, I'd be happy.