>>283700319
I really thought Whitebeard, Kaido, and Big Mom were going to fight Imu, and then when Rocks was defeated, Imu would escape from the island so the "unprecedented thing" doesn't have a chance to happen, and Whitebeard, Kaido, and Big Mom would only after seeing Rocks dead leave his crew and go their separate ways. Literally everyone left immediately which makes it seem badly written, like Oda knew only Garp and Roger should be fighting Rocks, but didn't have a natural reason why Whitebeard (at least) if not Kaido and Big Mom wouldn't join in against Rocks. He's been planning this incident since the start when a younger Oda thought it up, but now an older Oda has to write the actual details and it comes off a bit iffy.