User blog comment:Neko Neko no Mi Model: Russian Blue/Bellamy: New Heart Pirate/@comment-8823907-20130504161401

Interesting theory. Right now i have the feeling that Bellamy is just fanaticaly interested in being in Doffys crew. But we have seen something like this previously with Brownbeard and Ceasr. Brownbeard worshiped Ceasr and than betrayed him and tryed to stop him (although i have to admit that it was after Cesar order his assasination and we alredy saw that doffy tryed to kill Bellamy). My point is loyality can change in one piece.

If he would join Law my guess is that it could be because Diamante will say something like  Doffy was just using you you idiot and Bellamy will snap and join Law.