RELEVANT QUESTIONS–DON’T READ IF YOU DON’T WANT TO KNOW!!!
Is Rob Estes leaving 90210? — Barbara
MICKEY: Yes. As has been previously reported, neither he nor Jennie Garth will be back next season. It’s no secret that the new showrunners have officially shut down Operation Nostalgia. Shannen Doherty tells us that plans for Brenda to return have been scrapped, and don’t expect Donna to ever drop in from Tokyo again — with or without David.
Credit: TVGuide.com
TeenDramaWhore 
This is also a few of the season 2 teases Rebecca Sinclair gave early last year (among she gave was the big story she had for Rumer Willis at the second half of the season). I wonder why it didn’t all worked out the way it should have.