If you are in BK, this is a good question for your attorney who is familiar with your entire situation. If I understand however, at the auction, if no one bids on the unit, the bank takes ownership. At some later date, after you're gone they will list it for sale.
Have you considered a short sale? This could preserve some benefits for you and may allow you to forestall the foreclosure. Again, your attorney should be consulted before you make any decisions.