Valuation for the team for the sale is 2.3 billion and does not include the Barclays Center (which Prokhorov is the majority shareholder of).  Tsai will have the option in 4 years to buy a controlling interest away from Prokhorov who currently remains the controlling owner.

http://www.espn.com/nba/story/_/id/21181226/alibaba-co-founder-joseph-tsai-agrees-purchase-49-percent-minority-stake-brooklyn-nets