User blog comment:Gametroller Prime/Four Great Powers?/@comment-24769684-20160218165229/@comment-5774380-20160219132018

The Marines and Shichibukai had to ally too to beat Whitebeard, and the defeat in Sabaody was before the timeskip. After the 2 years, and if we assume that all Supernovas are around the same level than Law, who was named Shichibukai, it can be said that they are on a Shichibukai level.