What if J’hasi wasn’t the Nerevarine?
This could go one of two ways: either he still gets captured by slavers, and ends up along the same storyline except he’s in and out of prison and maybe joins the Thieves’ Guild so he can make enough money to get back home to Black Marsh, OR he stays with his tribe, gets sent out when he’s of age to learn of the outside world, realizes it sucks but travels more and learning as much as he can. At least until Jeer’s suddenly like ‘hey mate, we have to go back home’ when the Hist starts calling all of the Argonians back to Black Marsh in preparation for the Oblivion Crisis that’s about to happen. Of which J’hasi Marsh-Eyes helps his tribemembers close the gates and maybe survives and then he’d probably tell Sees all he learned out in the outside world and then either goes back out there, or stays put and lives out his days in the tribe. Whether or not he joins with the Hist is something up for debate.
Either way, his story gets a lot shorter.