Yeah - we definitely need Michigan to look good. NU has what amounts to a 2 game lead on them in the B1G. We could also use Boston College to win a few big games down the stretch.
Look at the lists of "last 4 in", "last 4 byes", "first 4 out", etc. The teams on those lists are who we need to lose. There was good news yesterday in that UCLA, Marquette, NC State, Washington, & Kansas State all lost, while NU won.
The path of least resistance for NU would seem to be to win out in the regular season. They'd be 23-8 and no worse than 4th in the B1G. Had Purdue defeated MSU yesterday, NU could have dreamt of a 3rd place finish - but that is not likely now. Anyway, that might be enough to get NU in - regardless of what happens in the B1G tournament.
It would be nice to avoid a scenario where NU must win 2 games in the B1G tourney, because that 2nd one would have to be against Purdue, OSU, or MSU. You'd also hate to face a 'must-win' situation against Michigan in the quarter-final, too.