Originally Posted by
Enrif
How about theorising a scenario that makes all of this plausible.
Saurfang talks to Anduin, stating that the Banshee Queen must be put down, to prevent what happened with Garrosh.
Anduin agrees and let's Saurfang go. Saurfang first heads up the eastern Kingdoms, meeting with Lor'themar and getting him on his side.
After that they go to the Desolate Council and get them to their side. Finally going back to Kalimdor, he will get to Baine and will acquire his help too. Back in Orgrimmar he rallies then the Orcs and Trolls.
BUT, there is no open rebellion yet.
Next is getting the allied Races on board. The Mag'Har will probably follow more likely an Orc then the Banshee Queen. The Nightborne and High Mountain are also already closer to the Blood Elves and Tauren, so they could be easily swayed.
Means only the Golbins and the Zandalari are left.
Let's say they manage somehow to convince the Goblins and Zandalari too. Only then there will be a "Rebelion" against Sylvanas. BUT, it will not lead to SoO 2.
Sylvanas, would be fully aware of what transpired the whole time and made her quiet escape and no one, even Nathanos does not know where she went.
The Horde is again united. Saurfang or Baine become Warchief. Nathanos joines the Desolate Council and rules the Forsaken for the time.
As for Sylvanas... she went to Northrend. She needs new subject. This time, they have to be loyal, without question. She will encounter the Lich King. And then, next expansion!