Sharon Stone is considering a $ 6 million-plus offer to star in a movie version of Michael Korda’s book “The Immortals” for Dino De Laurentiis Communications.While DDLC president Steven Deutch refused comment yesterday, sources said Stone has agreed in principle to terms of the deal, though papers have not been signed. Stone’s agent, ICM’s Guy McElwaine, said the actress is “looking forward to seeing the fictionalized version” of Cynthia Cidre’s script, which reportedly is only loosely based on the Korda novel about the last six months of Marilyn Monroe’s life and the relationships she had with John and Bobby Kennedy. At one time it was rumored that Madonna might play Monroe, but that never materialized. Sources insist that Stone refuses to portray Monroe and is only interested in playing a fictional actress of the ’60s. DDLC reportedly has agreed to redo Cidre’s script and will likely change the name. Depends on a director The actress’s commitment to the project is also pending the signing of a director. DDLC, which reportedly would like to start production in late fall, has an offer out to Stephen Frears. The director’s agent, John Burnham of the William Morris Agency, confirmed the offer yesterday, saying “Immortals” is one of several projects currently “under consideration” by Frears. The director, in postproduction on “The Snappers” for the BBC, most recently directed the feature “Hero,” starring Dustin Hoffman. Stone, who wrapped Paramount’s “Sliver” yesterday, starts Mark Rydell’s “Intersection,” opposite Richard Gere, on March 15. She is also doing a guest spot in Columbia’s Arnold Schwarzenegger starrer “The Last Action Hero” and in the next six months will star in Carolco’s “Manhattan Ghost Story” for producer Robert Lawrence.