As far as I know, Witcher 3 is going to be an RPG. Probably, somehow our choices are going to directly or indirectly affect things that are going on in the plot.
There must be some kind of opposition to Emhyr, whether it is this Morvran fellow or not. I assume the Nilfgaardian nobles are not fools and maybe found out already about the false Ciri. Just a speculation. Geralt probably knows this already, or will know once he reaches Nilfgaard. ›››
Yea I've speculated that TW3 could have two paths, a pro-Emhyr one and an anti. Perhaps Vattier de Rideaux could be a Roche / Iorveth kind of character if we go with pro-Emhyr (unless he's actually not loyal).
Of course Geralt would need strong incentives to side with either as I do not see him being involved in politics, Nilfgaardian politics no less, without a strong incentive.
But I wanted to ask you folk, as you most likely played more games than I did. Have you ever had a game with a puppeteer of such a scale without him even showing up? I think it's pretty impressive on the part of CDPR to make a character who didn't even show up yet sound so badass and cunning.