Well you would be correct because guess who just crowed for the first time today? Still don't know what breed because this clutch of eggs came from a neighbors hen boxes and he's got a pretty diverse flock.
The first one is a mixed breed (possibly Easter Egger) rooster. The second cockerel may be mixed, too, but I would guess that he is an Australorp. Most Black Marans have feathered legs, and I don't see that with him.