According the The Hollywood Reporter, Shannen Doherty has agreed to be a part of the revival. She of course will be playing herself, playing a Shannen that doesn't want to join and be a part of the revival.
This thing is going to be so meta. I can't wait.
The official logline:
"Having gone their separate ways since the original series ended 19 years ago, Shannen, Jason, Jennie, Ian, Gabrielle, Brian and Tori reunite when one of them suggests it’s time to get a Beverly Hills, 90210 reboot up and running. But getting it going may make for an even more delicious soap than the reboot itself. What will happen when first loves, old romances, friends and frenemies come back together, as this iconic cast — whom the whole world watched grow up together — attempts to continue from where they left off?"