Chaos King:

http://vignette3.wikia.nocookie.net/vsbattles/images/2/2e/2820961-chaos_king.jpg/revision/latest?cb=20131120134843

vs.

Dominus (at his peak):

http://vignette1.wikia.nocookie.net/marvel_dc/images/6/61/Superman_Vol_2_138_Textless.jpg/revision/latest?cb=20160423000432

Who wins?