Will this year's Best Director Oscar race be the most diverse ever?

by Nathaniel R
from left to right: del Toro, Guadagnino, Wright, Peele, Jenkins, Rees, Nolan, McDonagh, Aronofsky, Baker, Spielberg, Gerwig, Scott, Bigelow, Coppola, Villeneuve
While I was updating the Oscar charts for Picture and Director it occurred to me that the Academy's directing branch could well come up with their most diverse shortlist ever. Generally speaking when the Best Director lineup has had some variations from its usual five middle aged white American directors it's been with older white European auteurs. But in the past twelve years things have been shifting for that category quite a lot despite frequent complaints that they aren't changing at all. Or at least that they're not changing fast enough.
Consider that the following things have all happened in the past twelve Oscar races: