Also, I just checked last year's league and rosters CAN be carried over to next year. So if you played last year and have guys you absolutely wanted to keep then don't worry.
For those who don't return, I'll try and put those teams up for "claim" so new guys can pick an already constructed team and work from there... or you can start completely from scratch if you so choose. For example, I am certain of one person who won't return. His roster included the likes of Dwyane Wade, Tony Parker, and Joe Johnson. Not a bad starting point