I've heard some say that this particular tale points to a return of the Burning Legion next expansion. As a reminder, The Burdens of Shaohao takes place on the cusp of the Sundering during the War of the Ancients. What we're viewing here are events from over 10,000 years ago -- this isn't current-day material, this is the story of how Pandaria came to be floating in the middle of nowhere, cloaked by mists.
Therefore, while the tale is certainly entertaining, the inclusion of the Burning Legion isn't really relevant to the story today. However, Wrathion's visions certainly have indicated something similar coming in the future, so who knows? Watch the video above, and don't forget to like it on Youtube and leave your comments if you like the content and you'd like to see more!