Of course, killing Demogorgon only sends him back to the Abyss for 100 hundred years. And a bunch of Demon Lords wound up in the Underdark pretty recently during the Rage of Demons, and Elturel has only just returned from its brief stay in Avernus, and the presence of Raphael definitely signifies that the inhabitants of the Lower Planes will be taking an interest in BG3. Afterall if the Mindflayers eat all of the mortals, the Soul Trade will be significantly impacted, and not in a good/bad way.
