From Twitchfilm, "Nope, it's not April yet, so I'm assuming this is legit until I hear otherwise.
It appears as though Chow Yun Fat has finally struck upon a sure fire method of repeating his massive Hong Kong success in North America: by repeating his biggest role. Word in Hong Kong's Apple Daily is that Chow Yun Fat will be starring alongside an American actor in a remake of Hard Boiled, arguably one of the best action films ever made. Word is that the director's chair was offered to John Woo who declined to remake his own film, at which point Chow suggested producers contact Hong Kong helmer and obvious Woo admirer Johnnie To (Breaking News, The Mission, Election).
Apple Daily apparently has had the story confirmed by both Chow and To, so this seems dead solid. The film will begin production in May 2007."