Board Thread:Skyrim/@comment-139.162.35.220-20160909093520/@comment-26893431-20160911205949

72.174.60.181 wrote: He does say he wants you to replace Miraak, but you can defy his wish every step of the way. Unless it specifically states it elsewhere in an official source, becoming Mora's champion is not canon. You are his Champion, this is a fact. The Dragonborn DLC is canon, at least, its main questline, which involves becoming his Champion.

Jyggalag's curse was broken, since the curse litterally forced Jyggalag to let the Greymarch Occur. Jyggalag himself even says that he's 'free to roam Oblivion once more'.