So in some way, it seems that the first god somehow progressed from being a man to being a god with no god superior to him, and no savior to intervene. It would be like the complete realization of some Nietzschean superman.
I have hypothesized that the first God(s) became such after an evolution of trial and error. Now that they are there, they have devloped a much more efficient way.
Jainism holds that while there are many gods, there is no supreme being creator God as most theists would tend to think of God. Similarly, while Mormonism is henotheistic in that it teaches that there are many gods besides the three Gods that are explicitly worshipped in Mormonism (the Father, the Son, and the Holy Ghost),
I used to think we were henotheistic too, and as far as I can tell, no one believed that until I brought it up years ago. However, considering that the term was developed to describe Roman and Greek systems, I have come to realize that LDS are not henotheistic at all. We do not worship (pray to) any of the other Gods.
is there really any ultimate supreme being over the multiverse in Mormonism? It does not appear so, as this thought experiment may illustrate.
I've never thought so. I've always imagined a scatttered (throughout the multiverses) civilization of Gods though it is not unreasonable to think that certain factions gain power from time to time. All speculation of course.
And if that is the case, isn't Mormonism, like Jainism, "polytheist, monotheist, nontheist and atheist all at the same time"? (Mormons would be henotheistic, not polytheistic, however.)
No. We have nothing to do with the other Gods.