Less then 10 weeks till showtime.
At this point I think UFC may be waiting for the result of Weidman vs. Machida.
If the champ leaves that fight healthy, then they got no problem booking a middleweight title fight for the Rio PPV in October. In that case Dillashaw vs. Assuncao/Barao could headline 177.
If Weidman and Machida leave injured, then Assuncao/Barao would probably headline the Rio PPV, and so Johnson vs. Dodson II would have to headline 177.