Suggested by Sonic Hard to believe it’s already been 10 years since Lois Lane took Ben 10 down right? Well he’s not going to have much better luck against Superman. Superman’s strength, speed, and other attributes are way too intense for Ben 10 to hold his own against. The difference in their respective power levels is just way too intense. Ben 10 wouldn’t really be able to keep up here and even if he did, I don’t think any of his powers are impressive enough to injure Superman. Perhaps his chemical form could turn into Kryptonite assuming Ben 10 would even know the composition of it but Superman speedblitzes and ends the match in an instant. Superman wins.