Board Thread:Lore Discussion/@comment-30011802-20161221134918/@comment-26893431-20161222132922

Ottoman Hold wrote: Well, yeah. However, the exact sequence of events is unknown, so really, the DB is not necessarily bound to Mora. The only thing that can be said about the Dragonborn DLC is that Miraak did appear again, and the people of Solsheim were temporarily enslaved. In terms of the series storyline, you do not know what occurs after this until TES:VI due to the radiant aspect of each player's character.

Main questlines of DLC's are canon by default. So us killing -- and thus replacing -- Miraak is canon.

Unless if Bethesda chooses to contradict it.