The folks at Cage Potato claim they have a strong source saying that these two have been signed to coach this fall's season of The Ultimate Fighter:

They'll take some heat for putting the division on ice, but I like the call if it's true.  There is seriously nobody out there that is a legit contender right now, it doesn't hurt to try to establish some guys while they get Nogueira over with their mainstream audience.  I think with Mir's comeback story and Nog's own charm they will actually be able to turn what would be a nothing fight now into a big fight around November or December.  Nog will be champ for a while, I think it's a good move in terms of getting behind him.

The one thing that calls this into question is Mir's upcoming fight with Justin McCully.  Unless this fight is cancelled Mir will almost surely not be the coach, since the filming actually starts in June.  I guess it's something to keep an eye on.