[@Lord Wraith] To be fair, unless a hero comes around that can basically cream Superman with him having almost no hope of winning WITHOUT using kryptonite, AND said hero becomes as mainstream as Batman/Superman/WW/Cyborg/ext while also being countered by one or two of those heroes as hard as they counter Superman, Superman is just a better villain than a hero. Hes just too strong otherwise.

Marvel is way better at hero balance than DC. You could lose Superman from DC and not lose much, and infact everything would be better as heroes would counter heroes and such and no hero would feel so super domineering in-universe as it does now. Sure Batman would still be top billing, but people are ok with him since lots of heroes can beat him 1v1.