Various DC characters have met their end at Superman's hands, including Doctor Light and Darkseid. In alternate storylines, Superman has killed fellow heroes like The Flash, Wonder Woman ...

Darkseid's Omega Effect powers could potentially come from the sun, making him far more dangerous. Superman and Darkseid both being powered by the sun implies similar strengths and weaknesses.

Darkseid can corrupt others with ease - he mind-controlled Superman and Martian Manhunter, and bent an entire planet to his will. Darkseid has crushed a Green Lantern Power Ring in his bare hands ...