I would prefer to show this story as 'real time' unfolding, not as legends shrouded in the mists of time. After all, the entire first season is more 'legendary' than this event. Meaning, I don't want to change the tone of the show. UNLESS the story is told in the frame, and it is told as a 'remember this quaint nursery tale my mom used to tell me!' which then cuts into the real events of our primary story.