If he was bred to a non cream horse and the foal was palomino or buckskins then yeah he would be smokey black. But you can't tell by looking cream cannot affect black pigment unless the horse has two copies of cream. Posted via Mobile Device
What a neat coloured baby! It would be interesting to see what it would test as. Now, does anyone else not think the mare is a liver chestnut? It's difficult to tell, but I can almost swear I see black on her legs above the socks and black in her main and tail, but with the lighting it's a little hard to tell. Brown maybe? Not that I know if it would make a difference or not, but it's just something I noticed.
Also, you should have a really nice looking baby, happy foaling!