The flagship luxury sedan will debut the first of an "entirely new" family of engines, said president Johan de Nysschen.
The snippet was revealed as part of an extended community Q&A session on Jalopnik, after the CT6 was teased during commercial breaks for the 87th Academy Awards television broadcast.
The car is seen as a rival to BMW's 7 Series, and will be officially revealed at the 2015 New York Auto Show in April.
De Nysschen also cited Apple as his most admired brand, and disclosed that while his current drive was a CTS V Sport, his first was a Volkswagen Beetle, one which he rolled within the first 24 hours of ownership. "Not a great start," he quipped.