Plourde v. Wal-Mart Canada Corp., Supreme Court of Canada, November 27, 2009 [upholding the right of Wal-Mart, Inc. to close its operations in Jonquiere, Quebec, shortly after a union attempted to organize employees in 2005].
Reported in JURIST's Paper Chase here. Latest commentary available here. JURIST has more on legal issues surrounding Wal-Mart.