My takeaway from the final cutscene is that Eivor was just learning about the Isu from Odin and must of became buddies with the Native Americans since Eivor was buried and most likely not by a grizzly bear, so in conclusion Eivor was just chilling.

@irnassassin The grave shows an axe and shield alongside Eivor's skeleton, while the lore dictates that Eivor discarded all weapons, including the hidden blade. Doesn't make a lick of sense. Surely, there was no smooth sailing the whole way through. Eivor and the Natives could have been guarding the Grand Temple from hostile forces or even got inside somehow. I don't believe Eivor travelled all that way just for knowledge. It doesn't fit the notion of "distant shores and new adventures" well enough.