BfA trailer speculation

While I was watching the trailer again today I noticed that at the end both sylvanas and anduin are smiling slyly. Now bear with me here because I know I'm grasping at straws here bit maybe just maybe they are both being manipulated by someone , specifically the old gods. Taking into account the whispers of ilgynoth and the varimathras quotes , I belive this may very well be true. However I do not believe Blizz would make the same mistakes they did with Garrosh so the smiles can likely be attributed to the thrill of the battle. Ok tinfoil hat off now.