Somebody asked Peter King about the Vikings' situation, and he said that he doesn't think they will have to interview another minority candidate, since the whole point of the rule is that at least one minority candidate gets an interview, and they already have one.
I wasn't sure if I liked the Rooney rule when the NFL implemented it, but I think it's turned out to be a good thing. There was an entrenched old boys network in NFL front offices, and the Rooney rule has helped break that up faster without precluding anyone from hiring the coach of their choice. All it has cost the teams is a little bit of time, and minority coaching candidates have stated that it's allowed them to at least get their name out there even when they haven't been seriously considered.