Is he that Kree guy that showed up in the Operation Galactic Storm crossover from the 90's? If it is, he's an Eternal?
I think that DC takes this because of Superman, The Flash and Martian Manhunter. The Eternals are gods, but they're not on the same power level as Odin, Zeus, etc. Cyborg and Aquaman are the weakest links for the DC team, but I think that they can pull it off.
He basically KO Thor with a single punch. His strength is insane considering that Thor has been hit multiple times by the likes of Durok, enraged Hulk, the Destroyer, etc. and haven't been KO. Moreover, this guy have a protective shield around himself similar to the Juggernaut- that Tank Shells can't even penetrate. However, what makes him even far more dangerous is the Cosmic/Elemental blasts he fires. A single blast literally KO Thor for hours, and he did this TWICE!!! You add a very powerful Sersi to the mix and this Eternal Team is hard to beat; considering the likes of Gilgamesh and Ikaris for extra support..