Cool theorycrafting. I love doing it, but too many people forget the author/dev is the one who has to come up with this and their personal character determines a lot of it. Cari borrows and adapts, he doesn't really subvert. I have no idea if he likes "Wheel of Time", but we do have enough to piece together most of his material. "Ready player one", obviously, other pop culture millenial media, greek/latin/biblical mythology. That leans less towards time stuff/loops and way more towards more classical tales of sacrifice, heroism and bravery, honor etc. common in old european myth.
It's significantly likely we'll get a mix of the "hero defeats the villain after choosing to be honorable" from pop culture (note - this largely happens in things like Harry Potter, One Piece, Ready player one etc.) and the classical greek "heroe's journey" which returns the hero back to where he began after he overcomes impossible odds. This also fits a lot more with cari's style of polished, proper, AAA, but not overly artsy/risky.
Now there's quite a few ways it can play out, but we probably WILL get a moral choice to either achieve dominion over Eternum (with our harem) or bring things back to normal, win, return to the real world (with the harem or with singular girls).
Time loop stuff will likely be more of a side thing. Not saying it won't feature, by cyclical/rebirth ideas are more oriental in origin. I don't even know where cari is from, but culturally western/european ideas are heavily weighed down by the "moment", you need to be brave at the moment, you need to be honorable now, you need to be strong and responsible, consequences are heavy. Adding a cyclical/rebirth motiff as a central theme breaks that.
Could be wrong, of course. You always have to remember, devs and authors often read theorycrafting and can change their original idea to either a cool one or avoid a figured out thing.