Speaking as someone who has been running a very long-term d20 Star Wars campaign since the release of the Revised Core Rulebook, I'm really, really hoping that the system is torn down and rebuilt from scratch. Forget back-compatibility with older products - there's just too much non-functional stuff that needs fixing. Really basic, core stuff, like Stun damage, and starship combat, and feebly token DCs on skill checks, a skill list that still reflects its dungeon-crawling origin far too heavily, and the complete imbalance between attack modifiers and defence scores, lightsaber combats being over in about 12 seconds whereas starfighter duels can take hours, and the disaster that is Force Points.
An errata document that's approaching the size of the core rulebook surely indicates that just reformatting the book and including stats for a few of the characters from Revenge of the Sith simply aren't going to cut it. Major surgery is required. I'm not sure to what extent the work on this book has already been done, but I'd advise the writers to go to their FLGS, but a copy of Eden's Buffy RPG, and learn how a cinematic licensed system SHOULD work. Hell, unless this product blows me away, I'll be running my next Star Wars game using a modifed version of Buffy - assuming I run it ever again, considering how burnt out I am on the whole deal after wrestling with the lousy d20 rules for so long.
Knowing Wizards, I'd be pessimistic. But OStephens mentioned playtesting above, and (so long as this playtesting covers characters above 10th level this time round - as the playtesting for the previous version conspicuously failed to do), for that reason, I will remain a little hopeful.