If there is an announcement over the next few days, I fully deserve to eat crow. All of my thoughts still stand, especially if the next head coach is a coach is currently coaching another team. The exception is a coach like Matt Rhule, since he's not coaching. So, if the announce comes this week, I can see it being done for the following reasons.
1) Trev has made a move lock-down Rhule to make sure Rhule doesn't get hired by another school
2) Trev has told Mickey that MJ isn't going to get the full-time gig, but Trev would like him to remain on the staff (with a possible large raise), and Trev has discussed the transition plan with Mickey.
3) Mickey may have told Trev "I appreciate your honesty with me during this process, don't worry about my feelings, if you think you need to announce it, I am fine with it."
4) Mickey may have also told Trev "If you have an agreement with a coach in place, go ahead and announce it. I think the players would appreciate it, and it would be great to be able to tell recruits that our coach is going to be this guy."
All of those thoughts are speculation, and I'm not trying to be a flip-flopper. It's just me offering my thoughts as this continues to play out.