On this weekend, August 1 to 3, the Mtg US National Championships event will be held. The venue will be at the Hyatt Regency McCormick Place in Chicago, Illinois and will involve two formats, Standard and Booster Draft.
I guess this event will be the basis for the Standard post-Eventide metagame. I will be expecting new builds like the b/w midrange and similar enemy color decks and updates on regular tier one decks like the Faeries and Lark.
See the complete info on the event here.