I just hope all or most of the important rookies are in the game so that my dynasty mode will be awesome. I plan on trying to build the Hornets almost like the Thunder.
Whomever has signed by the cutoff date will be in the game. The renewed partnership with Synergy Sports suggests regular roster updates as in NBA Live 09 and NBA Live 10, so if they're not in the game at release they should be in the rosters soon enough.