I would think TH - as the lead - will be involved with the Oz shot.

But before, I think he's getting in some TNM (hence the tweet and article) and HR (interview tweets) promo work. Same with Brie (we're totes on a first name basis) and Jason Mitchell who are both working the January awards circuit. I would think the director would be on the ground first, followed (shortly) by the actors.

We will know for sure when he's spotted at an airport...or EO is spotted in Oz!