9.2 - Lich Anduin is born! We fight Sylvanas in raid... until 5%... then she turns around and decides she's been trying to help us this whole time #5DChess
9.2.5 - We have to find Arthas as for some contrived reason he's the only one who can help Anduin
9.3 - We beat Jailer with Anduin and Arthas' help and Arthas becomes the new jailer.
Then probably -
Sylvanas goes back to Orgimmar as a hero who helped save everyone and the Alliance tells her "If you fail to uphold honor, we will end you!" YES! #AllianceFistPumpMoment!
9.3.5 Some quest about Anduin teaching Tyrande how to learn forgiveness to be a real leader