for those interested in who Hakkon is.
Hakkon is an avvar god known as the Lord of Winter. The most recent avvar we have encountered in Dragon age were the barbarians in the fallow mire sidequest that saw the inquisitor fighting through them to free some inquisition soldiers taken prisoner
Totally sounds like a mid-main storyline branch off then
Hmm...
I'd imagine Solas will probably be the last DLC or something to close out the story ala DAII