The former Governor of California (pictured at a previous Comic-Con) revealed on a Day One panel in San Diego that Universal Pictures and Ivan Reitman are on board and have begun the search for a writer.

The news came at the end of a lively day as attendees enjoyed guest appearances from the Breaking Dawn cast, Sam Raimi, Tim Burton, Mila Kunis and Sylvester Stallone.

Proceedings got underway on Thursday morning as fans packed out the 6,000-seater Hall H to celebrate Robert Pattinson, Kristen Stewart, Taylor Lautner, author Stephenie Meyer and the key cast of The Twilight Saga: Breaking Dawn – Part 2 ahead of the series finale’s worldwide bow on Nov 16.

Bill Condon could not attend as he was in London scoring the film, however the director arranged for attendees to watch the first seven minutes of the film.

After the panel disbanded, Meyers stayed around to introduce first footage from Andrew Niccol’s adaptation of her sci-fi thriller The Host starring Saoirse Ronan. The film is due out on Mar 29, 2013 through Open Road in the US and Inferno handled international sales.

Burton took to the stage at the start of a lively Disney animation panel to talk up Frankenweenie, the feature version of his 1984 short that will premiere at Fantastic Fest and is due out on Oct 5. He showed three clips, one of which Disney had previously previewed at CinemaCon in April.

Raimi introduced stars Michelle Williams and Kunis from his fantasy prequel Oz: The Great And Powerful and showed first footage from the film. The lavish 3D origins story about the eponymous wizard also stars James Franco and Rachel Weisz and is set to open in March 2013.

Director Rich Moore introduced scenes from the eagerly anticipated animation Wreck-It Ralph starring John C Reilly as the voice of a computer game villain with existential angst. Reilly and co-star Sarah Silverman joined Moore on stage.

The Hall H crowd gave a standing ovation to Stallone and Schwarzenegger as they joined Dolph Lundgren, Terry Crews and Randy Couture to talk up The Expendables 2, due out on Aug 17 through Lionsgate. Nu Image sold international rights.

After Schwarzenegger broke the Twins news he added that an announcement would be forthcoming on The Governator, his animated collaboration with Stan Lee.

On Wednesday preview night a rapturous crowd watched a screening of Dredd (pictured) starring Karl Urban as the futuristic law enforcer Judge Dredd. IM Global handled international sales on the Reliance/IM Global sci-fi thriller which is set open through Lionsgate on Sept 21.