@kmohyudin:
I agree with people who think the structure of WG has been an enigma from the very beginning, and Oda using the reverie to reveal it makes sense in my opinion. When else did he had a chance to introduce Im before this? I don't discount Oda on the effect this reveal has on the characterization of the Gorosei, as it goes both ways. While there is no doubt that watching the Gorosei kneel before a new threat gives credence to Im, but at the same time it reduces Gorosei to "meh, so they are not the special ones after all". But, to be honest, I never felt that the Gorosei were anything special in the first place, because to me they were indistinguishable in personalities, the Huey-Dewey-Louie effect if you will. I hope that from here on out Oda builds their unique personalities and motives, and in that case I look forward to seeing where this is going.
To me, the bigger problem is the revolutionary. Them saying that they are here to rescue Kuma, what gives? Weren't they here to declare war on the celestials? If the reason they are doing this is because of Kuma, then I am sorry but this feels like a cop-out. Why do we need to go back to damsel in distress scenarios over and over again? I always felt that the straw hats not being heroes gave a nice parallel to the revolutionaries, who actually felt hero-ish. While Luffy, being a pirate, only acts in self-interest (and I use this term broadly), revolutionaries seemed like they acted because they believed that the world is corrupted and needed to be fixed. Their perspective felt distinct and bigger.
As for the BB vs Im, "who is the last boss" debate. My opinion on this matter is that BB is the final boss in Luffy's road to becoming Pirate King. When he reaches that stage, he would have become Roger's equal. Whitebeard said that after one piece is found there will be the biggest war the world has ever seen, I feel like that's the war that will be against the WG and the world order. Im would be the antagonist for that, after which Luffy would have surpassed Roger.
I can kind of get where wolfwood ant the rest are coming from since sure, the Gorosei among themselves were not really distinguishable but as a group and leaders of the world, they had a certain air and demeanor which made sense, and the fact how they discussed certain matter and such.
I think the wording is problematic but that´s not what i understood from that exchange. Basically, Sabo gets emotional and says we can´t leave him to his fate, basically in the hands of the CD, and someone answers "that´s why we are here", meaning we are here to destroy the CD, hence Kuma would at least be freed from them.
The rest of the convo does not imply that they are there for Kuma, it implies they feel bad about seeing Kuma, a sacrifice to the WG, and fulfilling their mission will help him, while never regaining his consciousness.
My take as well.