Well, they will be sex-linked, which will be awesome! Because your girls are barred, your males will hatch with the white spots on the head and the pullets will not have them. This will work great with the blue roo, but I've heard others say that the splash roos don't produce good sex links. Hard to tell who is who. So, barred males and probably bluish females. Not quite positive how all of the females would turn out. Personally I'm about to do the same thing (almost) Cuckoo Marans hens and Blue or Blue Wheaten AM.
Good luck! Would love to see pics when you do it.