The Tezzeret spoiled already is the one for the PW decks (though it will be Standard legal).
I'd assume we are getting a new Bolas, be really weird for them to mention him the way it does and there not to be.
Looks like a heavy focus on PW's this time around with 3 cards spoiled so far already mentioning planeswalkers (Ajani, Heart of Kiran, and Dark Intimations). Plus Disallow in a way since it includes activated abilities.