Michael Caine has told Empire that the key dates for Chris Nolan'sThe Dark Knight Rises are;
"Script in January, shoot in May, finish in November.'"
Which probably means we won't hear anything concrete about which characters/actors/plot-lines will descend upon Gotham until the New Year. Certainly that's what BOF have heard...
BOF has been told that if a TDKR announcement doesnt come between now and early next week, it will more than likely come in early 2011. My advice? Dont expect one til early next year and if one does come before the end of 2010, consider it a gift.
Don't misunderstand Caine's comments to Empire. I very much doubt it means that Jonathan Nolan's screenplay is having problems or is not yet complete, I think it simply means they aren't sending the screenplay out to the supporting actors of the film until the New Year for fear of spoilerish leaks, etc. This might also be the case for leads Christian Bale, Tom Hardy and whomever is playing that female role - but I'm guessing not. I presume they know exactly what to expect by now.