Clues about future plot lines

In the preface to World of Thedas, Mike Laidlaw, suggested that among the lore, particularly the narrative sidebars, might be a few hints about the future of Dragon Age.   One that immediately springs to mind is the double page picture of the Deep Roads with a tall godlike figure in the background, clearly foreshadowing what we discover about Mythal in Trespasser.   

In view of the fact that it seems likely the next instalment will be in northern Thedas and feature the conflict between Tevinter and the Qun, I am particularly drawn to the entry Battleground State about the island of Seheron.   We were introduced to the Fog Warriors by Fenris in DA2 and this entry expands on both them and other folklore of the natives of the islands.    It has the line "They tell us of the ancient Curse of Nahar that brought the fog, and the promise that will one day life it".    So could this be a major plotline?

The fact that Dorian returns to Tevinter and is made a Magister regardless of his status with the Inquisitor suggests that we will definitely be seeing him again, probably as an advisor figure.   However, one of the things he particularly wanted to do was track down his father's killers.   He also stated that they were likely also people who were against his reforms, so removing them would be killing two birds with one stone.    So could be investigating the murder of Halward be a major plotline?

Calpernia is never seen dead and her end is ambiguous both in game and in WoT2.   If you do Hushed Whispers you never even meet her.   However, as a former slave who still cares about her fellow slaves but made a serious misjudgement in taking up with Corypheus, she is an interesting character.   Her fate is addressed in the form of a question, the answer to which will likely be given in the future.   So will she return simply as part of a plot or as a companion?

Tallis is like Marmite, you either love her or you hate her.   I was never enamoured with her in Mark of the Assassin but I know there are those who were.  She has a considerable entry in WoT2 for such a small story contribution, which makes me suspect we will see her again, particularly as at the end it states that there are rumblings she has been part of Ben-Hassrath activity in Minrathous and how she could easily blend in with the elven underclass of the capital, considering she was once herself a slave.    My heart sinks at the thought of her being a companion, even more at the idea she might be the elven romance option, but she could equally be an antagonist considering she is still an agent of the Qun. So will Tallis be part of a future plotline?

The point of this post is not to speculate on the basis of what I would like to see in future games but the "clues" that I think are to be found as to what future plots might be. Are there any more hints that you have found in the source books as to possible plots in the future?