Buoyed by the success of the Ciel concept, GM executives are slated to green-light a Cadillac flagship later this year.

Destined to slot above the XTS, the luxurious model will ride on the new Omega platform which is loosely based on the Zeta architecture. Styling remains a mystery, but we wouldn't be surprised if a few design cues were lifted from the aforementioned concept.

If everything pans out, the flagship sedan (and possibly convertible) could be launched by 2015.