Actors Tom Cruise, Michael Douglas, and Mel Gibson had been considered to star in the film, using a script by Protosevich and with Ridley Scott as director; however, by June 1997, the studio's preference was for actor Arnold Schwarzenegger. In July, Scott and Schwarzenegger finalized negotiations, with production slated to begin the coming September, using Houston as a stand-in for the film's setting of Los Angeles. Scott had Protosevich replaced by a screenwriter of his own choosing, John Logan, with whom he spent months of intensive work on a number of different drafts. The Scott/Logan version of "I Am Legend" was a mix of sci-fi and psychological thriller, without dialogue in the first hour and with a sombre ending. The creatures in Logan's version were similar to the Darkseekers of the finished film in their animalistic, barbaric nature. The studio, fearing its lack of commercial appeal and merchandising potential, began to worry about the liberties they had given Scott – then on a negative streak of box office disappointments – and urged the production team to reconsider the lack of action in the screenplay. After an "esoteric" draft by writer Neal Jimenez, Warner Bros. reassigned Protosevich to the project, reluctantly working with Scott again.