Congratulations on a handsome pup! I also notice he has a nice short crop, which is what I would want if I got a Corso. (I know it's more common to have a longer one).
I think it was regarding the Cane Corso that I read the strong opinion that if it has that sort of black/tan Rottweiler type of markings it's, well, at least not an acceptable coloration. I don't know if the author of what I read also said that it isn't a purebred if it has those markings. Forgive me if I'm putting false information out there. There's a small possibility I was reading about the Boerboel.
I do know of one breeder who is quite visible on youtube that holds that the more stocky, heavy-boned, "rustic" Cane Corsos of today are actually Neo / Rott mixes. It's plausible in my mind, but there could certainly be other breeds in the DNA also.
So cool that you have a DNA test pending. I look forward to hearing about the results!