It turns out that people and objects can leave the Shadowlands and make their way back to Azeroth, as seen in the recent Afterlives animated shorts.
Unlike Uther, Draka's presence in Maldraxxus is no secret.
Sometimes a story builds off of a previous story.
First Shadowlands Afterlives animated short tells the hidden history of Bastion and Uther the Lightbringer
If, like me, you've been wondering how Uther the Lightbringer could have been in Bastion this whole time, and have been at Icecrown Citadel when we first saw Frostmourne, well, it turns out a lot happened to the soul of one of Azeroth's first Paladins.