There are some genes that have more effect on the color of a chick's down than they do on the adult feathers--I think that's why your chicks are so dark.
Same Light Brahma father. Mother is a silver spangled Appenzellers Spitzhauben. Again I was surprised at how dark it is and even how dark the feet are. I can see some blue coming from the splash Wyandotte but both parents of this one are nearly all white.
Chick will grow up silver with black markings. The markings may look like lacing, or like spangling--I don't know which.
Feet will have some feathers.
The Brahma father had yellow legs, right? I would have expected all his chicks to have light-colored legs, but clearly this one doesn't!
Head will have a crest, probably a small one. I do not know whether the crest will stick up (like the Spitzhauben mother's), or if it will lay backward (like a Cream Legbar's does.)
Comb: I do not know what it will look like when it grows up.
I would be VERY interested in seeing photos of this chick as it grow up. I have considered making almost exactly this cross myself, and have looked up what to expect: but the online genetics pages were not helpful. Apparently, no-one has bothered to write up or photograph what happens when you cross chickens with these particular comb types and feather colors. So I'm really eager to see yours as it grows!
(I find genetics fascinating, but they can also be frustrating. People figure it out by crossing breeds and paying attention to what offspring are produced, but certain crosses just haven't been done--or at least, not written about in places that I would find them.)