Accordingly to Macword.co.uk Adobe CS3 will be announced at 27th of March, 2007 at a special event in New York.
Although I do not have a precise information what is inside Adobe CS3 box, but the forthcoming renaming of Flash 9 to Flash CS3 gives me some hints that Flash 9 CAN be a part of Adobe CS3 package.
What do you think?
UPDATE: This is only an announcement date, the software is going to be actually shipped later in the spring'07.