Oh you didn't hear? lol It's Alleria's time to be the new super villain. She is taking Sylvanas' place.When I say Sylvanas redemption I don't mean make her good as a person. Nothing she can and will do for the next 5-10 years unless theirs a timeskip will redeem her villainous ways however her CHARACTER since the BOT to 9.1 can be saved [with good writing!]. Bolvar said he took her to Oribos. The only characters we have in Oribos are Bolvar, Baine, Thrall, Jaina, Calia, Talia, Tyrande, and the PC. None of them except Thrall have a former close and personal friendship type level to Sylvanas. With the Cosmic Forces arc coming in, Turalyon being the new leader of the Alliance and Stormwind and the Voidlords still not over and them being a threat and enemy to Death the perfect person to introduce in Shadowlands would be: Alleria Windrunner. There is no other better candidate than Alleria. Alleria:
Sylvanas' eldest sister
Sylvanas' mentor and icon
Left on a cliffhanger in the comic and the BFL cinematic
Void Wants Alleria to kill Sylvanas because she is an enemy
Easily will become the next lead figure in the next expansion almost guaranteed if it involves the Light
Had no actual character development since 7.3.5, BFA prepatch, and 8.2.5
Closest person to Sylvanas in life
Alleria can talk some sense into Sylvanas without actually forgiving what she has done. The Sylvanas she will be speaking to is one made whole. One she doesn't know and one she does. This also can lead in to finally shelving Sylvanas for a bit and pass Alleria the Windrunner spotlight torch.