Unless the avernus ending is heavily expanded upon I can't see it being anything more than the last mission of reach. That being a horde of enemies and the only objective being survive till you die which while cool isn't a happy ending in any sense other than atleast karlach won't be enslaved by zariel again and experimented on further. Personally i see way to much desire and drive to get her a happier ending for larian to just shaft so much of the community. Especially since this is their most popular game and listening to the community now would really help their next release.
