You're assuming the assets are contained by one owner. Most likely though the asset is shared by a number of financial institutions and will be attempted to be split by selling the house, but none of the new asset owners are willing to finance the split of an asset that may not show returns (like if the house is sold for very little money, or not sold at all).

This is also assuming that the company went bankrupt by being worth less than their total loans. It may have been a case of the company simply loosing income and being unable to pay their financiers, even when the loans were worth less than the total value of the company. In such a case I don't know what happens to the "left overs", but I assume that they would belong to the shareholders.