Nah, I don't think there'll be any crossovers either. The only connection between Kaguya and Subaru/Hokuto is the design (black hair, sparkly green eyes).
But about CLAMP, although they are credited only for the character designs, it's been revealed that they've also suggested a few ideas on the plot too. Probably only during the earliest stages of design. I'm guessing the mystery on Marianne is CLAMP influenced.
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But about CLAMP, although they are credited only for the character designs, it's been revealed that they've also suggested a few ideas on the plot too. Probably only during the earliest stages of design. I'm guessing the mystery on Marianne is CLAMP influenced.