And there was already a grey Hulk and eventually a red Superman with lightning.
Now that I think about it:
Savior returns as a worshipper of Superdoom. Gog and Magog plot a counter strike. It could basically be like what would happen is two Galactuses each with their own herald stage a fight on earth with Superman in the middle.
Not even sure how H'el is going to have any connection to Superdad if he returns. Also Ulysses doesnt have any connection to Superdad.