I answered this over ICQ to Phin. Only a breif outline though, for the same reason I didn't post about it; with the new title there is a sudden wave of hesitation over the assumed plot.
Mind you, those who dislike spoilers shouldn't get their hopes up TOO high; things like the scriptment are still probably more right than wrong.
Stay on topic, phins. This is NOT the GDF.
Well, the clue was that Yoda came in with an army of clones. And then there was the quote of OB1 which I think was confirmed, about not being able to win without the clones. And then Yoda says something like. "Victory? Not victory, but defeat. Begun the Clone Wars have."
But of course, we have no PROOF, we don't KNOW they come to help out, but it's POSSIBLE.