Here's how I see it:
Purdue is all but locked into the #1 seed.
ILL finishes the year with MN, @WI, Purdue, and @IA. Nebraska is 1.5 games back from ILL and own the tiebreaker. We would need to win out and have ILL drop two games.
WI ends with @IN, ILL, RU, and @Purdue. They are only a .5 game up with Nebraska. If we win out and WI drops a game that represents our best chance at a double bye.
NW is a .5 up on Nebraska and ends the year with @MD, IA, @MI ST, and MN. If NW drops a game and we win out I think we secure a double bye. I think this is our second most likely option to gaining a double bye.
Overall, I think the likelihood of Nebraska seeking into a #2 seed in the BIG 10 tourney is unlikely, but we have a good chance of receiving a double bye. If that happens we could rise to a #7 seed.
I'm not an expert by any means so take this with a grain of slaw.