Article says it's a Cadillac exclusive, yet it's being built at the Corvette factory in Bowling Green, KY. Base power to be 500HP. Slightly uprated power to be 550HP/627TRQ. That version might see duty in the C8 Z06 and/or a new Z/28 or a lightened Gen 7 ZL1. All speculation on my part. The article only says it's going to be in the Cadillac CT6 and CT6 V-sport.
https://jalopnik.com/this-twin-turbo-v8-is-the-first-cadillac-only-engine-in-1823954491
https://jalopnik.com/this-twin-turbo-v8-is-the-first-cadillac-only-engine-in-1823954491