It's complicated.. but the most likely outcome is Purdue getting the 4 seed and not playing on Thursday.
The 2 main keys to Purdue getting the #4 seed are (1) winning both remaining games AND (2) IU beating Maryland at home. Unfortunately neither will be resolved until the weekend.
Purdue is only projected to have the 6th highest conference win total at 11.5 according to the site I use, which statistically puts us on the outside looking in at the 4 seed. However, those fractional wins will resolve to whole numbers, and when they do.. If we win out (which is more probable than not) and tie other teams at 12-6, then it is most likely we get the 4 seed due to tie breakers.
If you can wait until after tonight's game it should be somewhat clearer. For all intents and purposes, the only remaining items of concern would then be Purdue taking care of business at home against Wisconsin and IU taking care of business at home against Maryland. If we win tonight I wouldn't buy Thursday game tickets.
Interestingly, if we do lose one more game, both the 6 and 7 seeds are more probable than the 5, so I guess whatever you do don't buy tickets for the Thursday early session.