There was a character in season 3 played by Ian Somerhalder, yes Boone from Lost, who was originally intended to be Bruce Wayne. TPTB at Warner Bros. wouldn’t let Smallville use Bruce Wayne because they didn’t want to confuse anyone when Batman Begins was released. So at the semi-last minute they turned him into some kind of zombie. Smallville itself came out of a pitch for an Adventures of Young Bruce Wayne series. Smallville came from a pitch.”]
Source: https://gizmodo.com/smallvilles-wonder-twins-include-our-favorite-hacker-p-5339066