User blog comment:ChiroSamai94/Straw Hats Rival??/@comment-3079795-20110506232317

The Supernovas are a big deal (ha, believe it or not after all the strong people in the Marineford Arc). They're the only pirates who could possibly rival the Straw Hats, and among them only Kid's crew is comparable. The majority of the crews only have strong captains.

It really remains to be seen, we have no idea how the Supernovas have changed during the time skip, we'll have a much clearer picture when they're reintroduced.