User blog comment:DoomFest/Thumbnails / Death Battles ideas/@comment-25968390-20150726160217/@comment-25968390-20150726163544

In addition, Doomsday, not it? I knew it. Also, correct me if I'm wrong but both Doomsday, & Lex Luthor defeated Superman at least once, yet never again afterwards, and even they have limits. If Goku's opponent in question is Lex Luthor himself, I'd be stunned. The rest of Superman's adversaries have no limit, so... Who else but Lex Luthor, and in case that fails, Batman could have the resources needed to defeat Superman anyway, and even he has limits. But for now, my temporary answer for Goku is Lex Luthor (Backup Guess: Batman).