I'm still pretty certain he has signed a new villa deal, but in reply to the above; if vlaar comes in I would fully expect our starting pair to be gardos and vlaar with Fonte as back up. Purely based on the amount that Koeman has been praising him.
I'd expect it to be Vlaar and Fonte. Fonte has just been given a new contract and made captain, as well as being fresh off a really good PL season. He won't be chucked aside.