 The Missoula Junior Bruins replaced the Missoula Maulers of the Western States Hockey League after arena negotiations with the Maulers' owner fell through.Prior to the 2017–18 season, the Lockport Express relocated to become the Niagara Falls PowerHawks, the Syracuse Stampede relocated to become the Oswego Stampede, and the West Michigan Wolves relocated to become the Lansing Wolves.The Chicago Jr. Bulldogs, Euless Jr. Stars, and L/A Fighting Spirit franchises were sold; the Bulldogs were relocated as the Wausau RiverWolves, the Jr. Stars re-branded as the Mid-Cities Jr. Stars, and the Fighting Spirit re-branded as the Lewiston/Auburn Nordiques.