Ah, yes. From this, I can understand 2 things:
1) the isekai harem protagonist part reminds me a lot about the idea of "John 2hu"
2) I heave heard of Invincible ever since Moriya Salesman brought it to YouTube. However, I have also heard a lot of negative opinions about the animation itself.
It would be quite a shame if that thread is indeed gone. The whole premise sounded like something that was really worth exploring.
The story, from what I managed to understand, is as it follows. I don't know how much of it is canon, and how much is fanon. Apparently, after Hou Yi killed Junko's son and husband, he took her as his wife. However, through some court plotting, Junko ended up killing him. And from then on, she kept the grudge on Chang'e, even if she was not directly involved.
This whole thing goes into one of the version of the story of Chang'e and Hou Yi. It is he version in which she took the immortality elixir in order to escape from her husband, and in the end he became some sort of kind or something (can't remember exactly the details), or he just ended up killed by someone. Anyway, it is the version of the story in which Chang'e taking the elixir was not out of sacrifice.
On a different note, why is Junko usually associated with the Xia dynasty of China (second millennium BCE)?
I have watched this video long ago. I really like it though, just as the one about the history of the entire world, I guess.
Also feel free to reply whenever you feel like it, as I have a few other threads going on and some more in planning.