Fortunately, since Mulally doesn't have quite the same ring, we can be pretty sure that the cars won't get new nameplates.
Source: NYT
Ford Stepping Down as Automaker’s Chief Executive
DEARBORN, Mich., Sept. 5 — With the Ford Motor Company struggling to end a financial crisis, William Clay Ford Jr. announced today that he is giving up the chief executive’s title, which he has held since October 2001. He will remain as Ford’s chairman, a position he has had since 1998.
Source: NYT