User blog comment:Monkey.D.Me/Out of frying pan, into the FIRE !!!!/@comment-109.228.163.195-20120201155825/@comment-4630086-20120201165631

I think that Jinbe is the ninth member, so the tenth will meet them at the last big saga for the final battle (an ex-world noble maybe?). Also Oda said that the last member will have 'asymmetry' body.