That makes the most sense.
He knows Gonzales is one of the nominees. Once he "fights" for Gonzales, it'll give him plenty of cover to torpedo anyone else who is nominated afterwards.
Gonzales won't be in this fight. Bush already knew a nomination to the SCOTUS was in the works prior to Gonzales appointment. Why would he have placed Gonzales prior to the Supreme Court nominee? Doesn't make sense. He has plans. And then there are two.