I have a theory about Bon Kurei. In the future a new character will be introduced and he will have the Mane Mane no mi, confirming Bon Kurei's death. The strawhats will befriend this new character and help solve some evil and heart-wrenching problem like always. In the end of arc resolution it will be revealed he is actually Bon Kurei in disguise, having to hide his identity to protect the Mugiwara crew. Everybody cries and parties, Bon Kurei officially joins the crew.
I believe Mr 2 is still inside the Imperial Down, he was shown there earlier in the previous cover story.