It really seems as if anyone goes against superman they get banned. Back on topic, again back in the regular dragonball series goku lift picollo who was the size of a building and threw him, a elephant easily weighs 10 tons. So since we all know that picollo had to be tremendously heavy during that time goku picked up more then 40 tons. Since we are stuck on the fact that the ki planet do and dont possess extreme gravity, Im going to leave that alone.
Im going to use nappa now. Nappa stopped a bug that was knocking buildings down from punching him by stopping his punch with his strength and then he ripped its finger off. The bug was easily a 80 tonner since it was knocking sky scraper size buildings down with ease.
Majority of all sayamans (gohun) appearance had over 100 ton strength feat but I just dont have a scanner to prove other wise. During cell and goku fight the entire planet was shaking, thats a feat that superman would never pull.
When superman stops getting owned by tirant who superman said was quick (from the way it looked, it appeared that he was too quick), then maybe he would even stand a chance against krillin. I wish I can put up youtube that is a part of the manga that have strength feats but that is something that you wont use because you want to keep goku down and up your character.
There is nothing that superman can do to goku that goku havent seen before. This battle should be nappa vs superman, that would be more interesting. Superman havent fought anyone like goku and goku is basically on another level.