One of the new models shown on the first build of Patch 9.2 is Sylvanas! Sylvanas is no longer wearing her Maw-infused armor, instead wearing simple prisoner garb similar to her teased appearance in the Patch 9.2 video.
Her eyes are are no longer red as well, as they changed to blue at the end of the Sanctum of Domination raid after confronting the Jailer.
Patch 9.2 PTR Build 41089 DataminingDatamined Mage Tower Return No Playable PTR Till After Thanksgiving Mounts & Models. Read more on wowhead.com