I have three theories for how I think this series will end. Listed from most to least likely:
1) Loses his powers and is stuck on main Earth forever while his son grows up to develop powers (ala WEHTTMOT).
2) Gets shifted to another Earth without a Superman and becomes that worlds champion (kinda hoping for this one myself).
3) Stays on main Earth but gets to keep his powers and changes his name to something else (Can't imagine too many fans of the old version being too happy with that).
Assuming the first option doesn't happen, who would like to see an ongoing of this series?