Ultra Cadillac still being considered?

Automotive News' David Sedgwick is reporting that, in a discussion with Bob Lutz, that Cadillac is still considering an ultra-Cadillac. SixteenThe question at this point is whether they would be looking at a super sedan (a la the Sixteen concept) or perhaps a halo sports car in the vein of the Cadillac Cien. The sedan would be more expensive to implement, but would sell in greater numbers. Either option would likely pack a V-10 or V-12 powerplant with a hybrid system being considered as well.