I didn't broach the question of what Sarko was doing within his own camp, after succeeding in producing a monolithic right in 2007. As I suggest, the voters he won from the Front National are likely to flow back there, and then some. Meanwhile, immediately, there were stirrings from the former "centre", properly called the centre-right.
He may well cleave more than he bargained for.
But the "monolithic Right" is an unnatural construct, and will inevitably degenerate into (at least) two mainstream right parties. My preference is for three, as in the good old days (Legitimists, Orleanists and Bonapartists).
But in the short term, the best we can hope for is that Dominique de Villepin will manage to get his party off the ground. He's struggling against a sort of soft-totalitarian blackout in the news media, combined with the shameless buying off/ threatening off of his parliamentary backers by Sarko's political machine. If he gets off the ground, he's going to be a formidable first-round rival for Sarko.
Meanwhile, the real danger of the second generation of the Le Pen dynasty is that she may be seen as the acceptable face of (post?) fascism. And as such, she may be able to mainstream the party, and take it into coalition. Historically, the main thing that has kept the FN out is not any great quantity of moral scruples from the "centre" right, but rather J-M Le Pen's habit of keeping himself beyond the pale, by making nasty anti-semitic "slips" when things started looking too cosy. It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II