@Buck09: The music guy is Scratchman Apoo.
On the Supernova, for now I can only see X-Drake joining Luffy & Law's alliance, being all the rest pretty much relunctant to such a thing, specially Kidd in my opinion.
Will all the Supernova at one point show up together? Perhaps, but for now I can only see a situation Ã* la
Assault of the Silver Dragons, just replace the dragons with the Marines.
(For those who don't get the reference, here's a clip