Legends are as ambiguous as they are epic. Details of any denomination lack any finality or sense of satisfaction. The lore of Star Swirl the Bearded is filled with such legends and fables.

However! As anypony should know, any tale of Star Swirl, be it mundane or legendary has all happened. An on this day one of his legends will return to the present. The overall outcome of it is anyponys guess, but the journey to it will be Legendary.