Stephon Marbury's Wife Joining Basketball Wives Cast?

Sources close to the production tell us ... Tasha Marbury is in final talks to join the show -- a much needed cast replacement after Royce, Jennifer and Kesha were all axed.

We're told producers approached Tasha for two main reasons ... she's actually a basketball wife (she and Stephon married in 2002) ... and secondly she's already friends with some of the other "wives."

Sources tell us, Tasha was previously asked to do season 1 of "BB Wives", except Stephon nixed the idea -- but now he lives in China part time playing for the Beijing Ducks ... and changed his tune.