I find it pretty unlikely that, anytime soon, both parties will be nominating a woman &/or a minority in the same year because I feel pretty confident in believing that the GOP won't be nominating a woman &/or a minority to lead their ticket anytime soon, let alone will they be ready to do so within the next decade.
In any case, Haley & maybe Ernst are the only realistic female/minority Republican nominees that I can think of; the former (who's admittedly the only 'minority' of the two) is no longer a "rising star" & would probably flame out spectacularly (not least since she's already pretty irrelevant anyway now that she's no longer U.N. Ambassador), & the latter in no way seems like a compelling candidate, so I wouldn't expect either to successfully win the nomination.
I agree about Haley. She seems to have a lot of potential to be Rubio 2.0. I don't think it's a coincidence that a lot of the same people who thought Rubio would be president right now are saying Haley will be in a few years.
I actually think Ivanka is the most likely woman to be nominated by the GOP soon. As terrifying as that is.
Eh, depends on whether or not we reach a point at which the GOP decides it needs to save face by turning on Trump & denouncing him going forward so that it can win elections.