Cadillac says it is exploring the possibility of adding a new flagship model over the XTS.

General Motors' Cadillac division has confirmed that it is seriously considering a new range-topper that would be positioned above the recently-introduced XTS sedan. The new model would be aimed at vehicles like the BMW 7-Series and Mercedes-Benz S-Class.

A flagship Cadillac has been rumored for years, but it looks as though the luxury division is finally moving forward with those plans. The new model would be larger than the XTS and also offer more luxury.

"Do I want something larger than XTS? Hope so. We're exploring something more substantial, larger and grander," Don Butler, vice president-marketing for Cadillac, told WardsAuto.

Butler didn't reveal any other details - including a possible launch date - but it is believed the new Cadillac flagship will be heavily influenced by Ciel concept - both in styling and drivetrain. Whereas the XTS rides on a front-wheel drive platform, the new Caddy range-topper is expected to adopt the Ciel's rear-wheel drive layout.

The Cadillac flagship is thought to still be in the early stages of development, so it will likely be three or four years before the car arrives in dealerships.