I like the cover itself. Very simple with just the Supernova Trio and some neat diamond portraits in the back that don't add much clutter. Who's Who a little too low and too red to be next to Kid, swap his place with X-Drake. The final version should distinguish them better.
The Flying Six colors schemes though...an interesting mess as usual. Page One and Ulti stand out when it's just heads only. Three variations of blonde on the others sure is a bizzare choice. Oda is such a cruel tease flipping through different colors like that. Ulti with Pagey's hair looked the best for me.