If all the establishment candidates except Rubio dropped out, that would be bad news, since the combined total of Rubio, Jeb, Christie, Kasich, and Fiorina in national polls would put the establishment ahead of Cruz and right behind Trump. Luckily the Bush political machine is too powerful and well-connected/funded for the RNC to force him out, so with any luck he and Rubio will stick it out until the end fighting over one another's votes.
I doubt Kasich, Christie, or Fiorina will still be there after super-Tuesday, however. There's also the question of where Carson's remaining 7-8% will go if/when he drops out.
I think Carson’s numbers will split for a combination of the non-establishment candidates with former religious conservative headliners Huckabee and Santorum.