Big Lots Inc. is preparing to file for bankruptcy as soon as Sunday, and plans to sell its chain of stores via a court-supervised process, Bloomberg's Reshmi Basu and Eliza Ronalds-Hannon report, citing people familiar with the plans. The company will continue to operate under Chapter 11 protection, the people said, and is in the process of lining up a so-called stalking horse bid, meaning it's subject to better offers should any materialize.