Had a thought about this (sorry if this has been mentioned before!). What if the wolf and the dragon do not represent a single person each.... what if they are ideas? Ideals?
Fen'Harel is known by the dalish as an evil god, and their best (if only) explanation for why Arlathan fell. However, with Solas' new perspective, we are now at liberty to question everything the Dalish know. Solas himself characterises Fen'Harel as a god of rebellion.
We know from DA2 that these are symbols of rebellion. We also know (from a codex somewhere which describes the art difference?) that they are a deliberate perversion of an ancient dragon symbol.
So fast forward to DAI. The game, arguably, is about faith, and the rise of a 'spiritual" leader when one is most needed; legitimate or not. It also outlines not only the current state of elves in Thedas, but slaves and servants, too. Regularly, parallels are drawn between ancient Arlathan and modern Orlais.
In his conversations with Sera, Solas admires her efforts on behalf on the "unseen" "regular people". Yet the difference between them is that Sera seems happy antagonising the upper classes as favour but not wholly upsetting the balance. Solas seems dismayed at her reluctance to rebel fully.
Solas, as Fen'Harel, walking among both elvhen "gods" and 'Forgotten Ones', could have been similar Sera's situation. To be more precise, it could have been equivalent to Briala - who walked for almost a lifetime as friend to the Empress, servants, and elves alike. Felassan nurtures in Briala tales of Fen'Harel - seeds of a slow and well-planned rebellion. Eventually, Briala makes her stand on behalf of who she believes are her people (despite, as she finds when she meets a Dalish clan for the first time, not having much in common with many of them at all). Her faceless people. The people. If you help her in DAI, she succeeds.
Solas as "Pride" has been speculated as suspicious in itself. 1000 years of sleep, and waking up he sees the hopelessly destructive aftermath of the rebellion he was so "proud" to be a part of. Proud to be included in it's headquarters at Skyhold. Pride to know how important - and inevitable - it is for the Inquisition to elect someone to lead them, to embody their own ideals, and remind them daily of those ideals. No doubt it is a suitable mantra for one who once took the position of Inquisitor himself and failed.
I have been revising Kierkegaard in anticipation for my classes beginning again soon and cannot help but see the parallels in Solas. Works of Kierkegaard often compare the practices of the Christian Church and the "pagan" Greek pantheons in attempts to decipher the "ethical". This passage from "Fear and Trembling" is which prompted me along this line of reasoning:
The paradox which Solas/Fen'Harel faces, is that he fights for all - for the universal good. However, if he finds his drive, his ability, his will, as uniquely equipped to successfully lead a cause - he has already isolated himself above the "all", asserted himself individually against the universal good. Therefore, as long as he is in this position, he is in spiritual trial.
Anyway, in the epilogue scene, Flemeth refers to Solas as "Dread Wolf". Not The Dread Wolf, however. This leaves room for interpretation. Firstly, it is possible that, since the Dread Wolf is associated with Arlathan's particular rebellion, the title came about and was given to multiple, perhaps many, key figures of that bloody uprising.
Secondly, it is possible that Fen'Harel, having once been merely an idea of many, came to be a spirit from those events. Solas has mentioned on numerous occasions how spirits can be manifestations of ideas - wisdom, compassion, pride etc. Is it such a leap to imagine such a great need for rebellion from an entire empire accumulated into one manifestation in the fade, realm of ideas?
If the former, we may take comfort in Solas simply being a survivor of the rebellion, with an unfinished duty to the people (which is, following this theory, not likely to include the elvhen pantheon). If the latter, then it may be likely that whoever the body of Solas belonged to before, he willingly surrendered his body to Fen'Harel, - the embodiment of his own ideals - to pilot in order to finish what he started.
In years to come, 'Red Jenny' may be a focus of worship, too.
Conclusion: An ageless depiction of the wolf as the oppressed, the dragon, the oppressors.