If I kinda assumed he just didn’t die here. I mean I get he can regen, but like, if his weakness was just getting shot in the head, then anyone on earth would’ve already beaten him.

The immortal didn’t know his limits until he fought Omniman the first time. He was pretty much the equivalent of a big fish in a small pond. Then the second time he fought Omni Man it was pure rage induced and honestly I feel like he did a better job the second time around.

I doubt he will try it a third time and focus on what he is capable of, handling earths problems.