Nebraska plays Indiana on Wednesday. I think the loser of that game is out of the NCAA tournament. If Nebraska wins this game and then beats Wisconsin at home and wins their first BTT game, I think they're in. If indiana wins and then goes to Michigan and wins, then they have a small chance by winning a couple BTT games. However, I'm pretty sure Nebraska and Indiana are mutually exclusive, or else neither make it.
Illinois isn't even on the bubble radar. 6-10 in the big ten and they finish up with Michigan and @Iowa. Which is why I said they need to do work this week to get back on the bubble. 8-10 in the B1G will put them there.
Minnesota is a maybe at this point. Solid SoS for sure, but they absolutely MUST win their last home game against Penn State. After that they will probably get the 7 seed in the BTT and play a weak opponent like NW which won't help them. They will then play a 2 seed team (probably MSU or Wisconsin) which will probably decide their fate. Win and in, lose and NIT.
I would bet the Big ten gets 6 teams in...the 5 locks and then either MN or Nebraska. Needless to say this last week of conference play will be entertaining to say the least. The BTT is also going to be a lot of fun