The 2009 Fusion Hybrid is rumored to run on "a brand new system dubbed “Gen II” – which is modeled after the Escape hybrid, but offers more US-sourced technology, better packaging flexibility, and better fuel efficiency."

http://www.autosavant.net/2007/09/pr...09-fusion.html

Fuel efficiency should be class-leading then, considering the Escape Hybrid already gets (negligibly) better '08 EPA city fuel economy than the Camry Hybrid.