yes he does have a theme! sounds a lot like I dont think now is the best time..i dunno which one is based off of which. listen to whole thing!

The música from the beginning to around 4 minutos is the epic song that plays in lord cutler beckett's death. so sad!!

Jack drinks Lord Beckett's wine and Beckett cusses for the first time (I think)

this seems like the only time he was really active. when he saw the little action figure of himself it was funny