Seeing as The Warden won’t be seen in Inquisition but there’ll be a quest based around them, what if The Inquisitor has to search the Deep Roads for them after their expedition vanished and finds their body? What if the bodies of other Wardens like Sigrun or Velanna are among them?
"I have two characters: one is the dragonborn, the other is a skilled thief/assassin. For the most part, they’ve both done completely different quests, with very little overlap. But I like to think they happened to meet for Blood on the Ice, and found the murderer together. It just seems to fit."