In the 2021 roadmap, it mentioned an update they were calling "Cult of the Wolf".
Mountains are the wolves' habitat. The February blog included some teaser images of the mountain update that included a werewolf/fenring in the shadows.
It's possible that the mountain update will not just include new instanced dungeons, but also new lore, possibly new mobs and drops. Could this be considered the "cult of the wolf" update or do people still think that will be a separate thing in the future?
Source: https://www.reddit.com/r/valheim/comments/sn0l0d/is_the_mountain_update_cult_of_the_wolf/