This is challenging, but there is nothing wrong for trying your best. @Cliff1647

Fire God Liu Kang, I guess. Superman is super strong to beat super powerful villains like Doomsday, Darkseid, Brainiac, and others.

Superman may be so powerful, but he has weaknesses too. Fire God Liu Kang can summon black holes and has power to erase anyone from existence. I think there is more that have chances to defeat him. I just can’t figure out who.

Me neither. Superman is just too strong.

I guess so. I think only beings who have magic or godlike power can do decent damage to him. “You can expect the unexpected.”