User blog comment:Fliu/Chapter 957: More Info on Rocks/@comment-7614831-20190927204814/@comment-108.83.222.210-20190928032138

Aside from the fact that it brings in more backstory I would say it serves a variety of functions. One, it demonstrates that Blackbeard has likely inherited the will of Rocks, whether he is aware of it or not. Two, it demonstrates that there was once someone who was able to gather under his banner three of the four Yonko as well as Captain John, the golden lion Shiki, and others who are likely dangerous in their own right. This ties in to number three, two Yonko forming an alliance could be seen as the second coming of Rocks. Rocks was defeated because he faced down Gol D. Roger, and Monkey D. Garp, tow individual who appeared to be the strongest of their generation as far as we can tell each the most powerful in their respective sides. Now with Big Mom and Kaido coming, the marines are seeing a rise of a power that could eventually prove to be greater in their eyes then Whitebeard or Roger ever could, thus the second coming of Rocks. They do not have the manpower to send to Wano to try and stop this and if something is not done, then they will face a massive power. This is what Luffy has to face, he and his crew are once again standing on the precipice of something that will affect more then just them and will shape the world in some way. Their actions in Wano will effectively shape what will happen next.