I would like the entire expansion to be about helping Sylvanas recover and every dungeon to be similar too Caverns of Time with scenarios surrounding different parts of her life.
The new currency could be Sylvanas tears and we could use her powers as a new borrowed power system Sylvanas tears will be similar to anima and azerite.
Cosmetics in the shop including her outfit and bow unlocks for people that didn’t get the bow in Shadowlands (50-100$). New class Dark Ranger. I want us all to run around looking like Sylvanas. Dark Rangers are a long time coming and I am sure is already in the works.