While the CTS-V Sedan and Coupe are great cars, the Cadillac brand is still in need of a true flagship model and nothing is off-limits – including a rear-drive mid-engine exotic.

One proposal reportedly under consideration is for something along the lines of the Cien concept (above) which was first unveiled almost a decade ago at the Detroit Auto Show in 2002. The two-seater would use an all-new platform and one possibility is that it would share a mid-engine architecture with a rumored C8 Corvette. Pricing for the exotic would need to be above $150,000 in order to be feasible, considering the small volume of sales.

This proposal is, however, unlikely and fits in with a list of other proposals that include a Mercedes CLS-styled 4-door coupe, a Mercedes CL imitating luxury coupe and a near-limousine-size luxury sedan.

The more likely direction Cadillac will take is to further develop a flagship sedan that would sit above the upcoming XTS, which is set to replace both the STS and DTS in the near future.

More: Cadillac Considering Mid-Engine Halo Car on AutoGuide.com