The Sacramento agreement is binding and will be the only deal on the table once the BOG votes the move down. This way the NBA doesn't have to actually "reject" the Hansen offer and use that binding agreement they have from Hansen on an expansion team, which is why I assume there have been delays. The Hansen agreement has to be changed in numerous areas to accommodate expansion rather than the Kings.
The NBA probably wants to announce both at once, then Stern walks out as the best Commish the NBA has ever seen. KJ walks out as the best Mayor Sac has ever had, and Hansen walks out as the savior of Seattle, and the Seattle fans say "they didn't want the Kings anyway". Works for everyone and all involved are saviors of their respected areas.
I really like this Gary.
