Goku vs Superman

I think either way it's a stale mate.

Goku has instant transmission so he can get away faster than Superman can fly/run and Superman is so strong he'd pretty much kill Goku with one punch. Goku is too fast for Superman to catch so it's impossible for either to win.

I think the main problem is that DC likes tinkering with canon. Sometimes Superman is portreyed as weak shit that gets his ass handed to him and nearly dies, while other times he's shown as having godlike powers.