Hi.. im a fan of one piece, but there is two question that i really want to ask..what is the mystery of the 'D' and will jimbei,kinemon,sabo joins luffy's crew?? i tried asking oda but he doesnt even read it or busy. if anyone know plz tell me. thanks

Im afraid the mystery of "D" is yet to be revealed except that those with the initial are the enemy of the celestial dragons. for your second question, i pearsonally hope sabo joins the crew but there is no indication of enyone joining enytime soon.

The only information we have on the 'Will of D', currently, is that is has something to do with being extremely strong and willful, like Luffy, Ace, Dragon and the rest, including Gol D. Roger. I believe it is a culmination of willpower and strength from the individual, as well as being unafraid of death.

For the second question, I believe Jimbei already said he would join the Straw Hats, but not right now. I believe it will occur a little later in the series. As for Kin'emon, I don't believe he will join the Straw Hats - he's a samurai and his code of honour would undoubtedly lead him to loyalty to the Wano Kingdom and to not join pirates... if I remember correctly, he didn't trust them when he first met them on Punk Hazard.

Lastly, Sabo. No. I doubt he will join the Straw Hats... he's the number 2 of the Revolutionary army, so I don't see any reason why he abandon Dragon and join Luffy. He has nakama within the Revos now, like Koala.