My guess is that nothing happens until after the last primary, then the leadership pressures the candidate behind in delegates to drop out & the Supers to support the delegate leader.  

Way too many people want this to end before the convention.  Right after the last primary is the first best place to do it.

Oh, and as soon as that happens, MI & FL become non-problems, my guess is that as a condition of being seated, they'll be told who to vote for as determined above in the first ballot.  

I know, it's not fair, but then MI & FL shouldn't of broken the rules in the first place, whey were warned. They got greedy, now they pay the piper.