jimbei will PROBABLY be it -- the crew needs a helmsman, and he's been drawn SO many times steering the prison ship. he could be just a temporary member, but with this caimie's remark about the fishman karate dojo, we KNOW that that the inevitable forthcoming fishman island arc will involve said dojo, and that pretty much guarantees JIMBEI FLASHBACK LOL. lastly, he promised ace that he'd look after luffy, and he's a direct connection to ace for luffy for the rest of the series. AAAAAND a fishman would provide some real visual variety to an already crazy diverse crew. plus, a srs-face old dude compliments that cast better than an infatuated one-note gag setup character