Unsure, but they are about to 100% forget they now have this quest until level 20 and are fighting a necromancer and his army of the dead and then suddenly need to keep turning surprisingly well made mirrors until light opens every door.
Dawnbreaker was a cool sword though.
If the idea involves simply walking into Avernus, I'll be as impressed as I'll be amused.
Beyond that, did the party specifically leave some members behind when I did not notice, or are they simply offscreen during this comic?