Infiniti has fired the latest round in the battle for hybrid supremacy with the unveiling of a new hybrid version of its latest M sedan, the 2012 Infiniti M35h. The car has now been confirmed for a world debut at the 2010 Los Angeles Auto Show, with first sales to follow in the spring of 2011. The launch has great significance for Nissan and Infiniti as the new M35h is the … John Voelcker. Senior Editor for High Gear Media focused on green car news and review coverage. …