User blog comment:Mrgjman/700- What we don't know/@comment-6883921-20130228064543

New Shichibukai

If canon, the pirate who cut off Z's arm might be the Shichibukai. The Shichibukai page even states that, though it could be a mistake.

Fujitora

I agree with Fujitora being a new Admiral. Since it's been two years, Luffy should be able to defeat a Vice Admiral easily; Sakazuki isn't ignorant to dispatch an officer who would be beaten easily. Also, since Fujitora is in Kanji, it's likely to be an alias. Maybe with something like Neko Neko no Mi, Model: Tiger?