OP, new competitor of the M5 is the CT5, no longer the CTS (and the V part is questionable for the name currently, as its rumored to be titled Blackwing despite not actually using the Blackwing engine) and is not either of those cars in the images. The cars in the images posted are CT4-V's, which are competitors to the "M-Performance" line, possibly with the 2 or 3 series, as the CT4 is a tweener vehicle in price/size. V is moving downmarket for a new brand (possibly Blackwing) to take its place.
Here is some information about the upcoming M competitors from Cadillac.
https://www.motor1.com/news/360643/c...upecharged-v8/