The Dread Wolf's connection to Mythal was established in Dragon Age: Inquisition during the quest What Pride Had Wrought, where a shrine to Fen'Harel appeared early on in Mythal's temple. This is expanded upon later during the epilogue and the DLC Dragon Age Inquisition: Trespasser, where it becomes clear Solas and Mythal had a close relationship through their interactions and their relative statues always appearing close to one another. While it's clear they were close during the reign of the Evanuris, another connection may make itself clear in Dragon Age: Dreadwolf.