Another option would be the production of a vehicle similar to the 2002 Cien concept (pictured) that Lutz maintains would cost less to produce, but would sell in smaller numbers.
If such a vehicle would come to fruition, expect power to come from a V12, a V10 or even a hybrid powertrain. The latter may be more appealing, as Lutz admits that federal fuel economy standards are going to have a great deal of influence on future models and GM's focus is beginning to turn towards more efficient vehicles.
[Source: Automotive News – Sub. Req.]