I got this from www.thecarconnection.com:
A CADDY S-CLASS?
General Motors is working on a large rear-drive Cadillac it hopes to bring out by 2007, said a high ranking GM executive. "Think of a Cadillac S Class," said the executive, referring to the Mercedes-Benz flagship. GM is jazzed by the revitalization of the luxury marque with products like Escalade and CTS having caught on with up-market buyers and feels the market is poised to accept a large Cadillac sedan as a domestic alternative to the S Class and BMW 7 Series.