Shannen Doherty going back to the `90210' 'hood, joining Garth, Spelling on new version

Brenda Walsh is all grown-up and returning to Beverly Hills, 90210, this fall.

But cast members of the new CW spin-off, "90210," are speculating whether Shannen Doherty will be equally mature when she reprises her role as Walsh.

"I have heard some of the stories," "90210" star AnnaLynne McCord said of the sometimes-volatile relationship between Doherty and co-star Jennie Garth on the original series, which aired from 1990-2000.

Garth is returning to her role as Kelly Taylor, now a school guidance counselor, on "90210."

In the new series, Doherty's Walsh is now a famous theater director invited …