Originally Posted by
vertigo12
Base on the title it seems that many back stories have been delayed for more than a decade and gave way to others.
It seems Shadowlands is not a an unexplored place for Sylvanas. After Frostmourne took her life, it seems as the Ranger General of Silvermoon should have went to Bastion or Maldraxxus [maybe if it wasn't for Arthas]. instead, worse, she went directly into the Maw [which happened due to her actions after being raised as a banshee, remember the "machine of death" wasn't broke yet] thus meaning the Maw problem is not a new thing, but has been a very big problem unseen by the living.
After returning from the dead as The Banshee Queen, she made contact with the Jailer. If she ended up in the Maw, she would definitely still want further revenge on Arthas in the Shadowlands. Possibly that is when she learned the secrets of the Helm of Domination and Frostmourne and applied whatever knowledge during her encounter with the new Lich King Bolvar in the Shadowlands cinematic and capturing Anduin to become the weapon.
What are your thoughts?