I'm looking forward to the new set, and Bib looks OK to me. If Mace is any indication, it may come out a little differently anyhow. I would be more excited if there were more aliens and less re-issues (Luke, R2, Chewie, 3PO), esxpecially at higher price-points.
I'm hoping the chases simply have the same "piece" as the figure they replace in the basic set. It seems unlikely that they would make chase pieces, but as Jeff said, Medicom can and will do nearly anything.