We all know go Lu would win b/c superman is a horny douch bag that can't keep his eye on a prize and b/c goku is better in the department in strength, tactic, and stamina. Did I mention superman can't shoot out Kai blasts and goku Han no real physical weakness.
well its hard to make a good movie for him because he only has one weakness. so to use kryptonite as a plot device in every movie isnt too appealing. its kinda like why there will never ever be a good hulk movie his only real enemy is the army and they suck. fighting hulk is like when i was a little kid playing superheros with other kids and they are like "nu-uh. im invincible now". luckly superman is way better than hulk ^^ i saw a youtube music video of superman dying in the cartoon version by some super strong alien thing beating him up so bad. that would make a good movie that wouldnt need kryptonite ^^