Brook and laboon will spend the rest of their lives together! Probably music here music there travel a little bit on grand line while they play their favorite music together a happy contentment for each other… both of them might die together from old age.. both didnt said goodbye this time because they knew they will meet each other again while they playing rumbar pirates song they both pass away at the same time.. in the after life they meet again where the rumbar pirates are waiting and go on a adventure in the afrer life but this time laboon is with them..