'Pearl Harbour' star Josh Hartnett has declined the role of Superman in the proposed new movie. Warner Bros, who were hoping Hartnett would accept the part, now have three more actors in line for the role. Brendan Fraser, known for his leading roles in 'The Mummy' and 'Gods and Monsters', and 'Fast and the Furious' star Paul Walker will soon be taking screen-tests for the movie, scheduled to start shooting later this year. Relative unknown, Matthew Bomer is also up for the role, having starred in US daytime dramas 'Guiding Light' and 'All My Children'...