So I was watching Nobbels new video and it all started making sense.
https://www.youtube.com/watch?v=kHdsj-nifFY
"The boy king serves at the masters table, 3 lies he will offer you."
"When your thrones run red with betrayal… when your holy places burn and the shattered mask hangs above your hearth… only then you will know. And it will be too late."
So, I think we could have a scene where Sylvanas is cornered and the alliance hero's are about to finish her off. However, when Anduin goes in for the finishing blow, Sylvanas and Auduin begin to kiss passionately much to shock of all the other main lore characters. This would be followed by unleashing the Jailor upon Azeroth. How do you think this will turn out?