Yes there are? A big battle where multiple characters fight together and ultimately do nothing before separating the main characters out for their legitimate fight.
It’s legit a Killer on the rooftop scenario lmao
As a writer Oda purpose is to show Imu as the big evil and portrayed it as the biggest enemy and perhaps also the strongest by FAR !!!
To showcase the strength and power.
He picks 6 of the most relevant strongest ppl that the story has produced in the meantime and attack Imu in a combine attack, and show that it did no damage.....to show how powerful Imu is.
Shiki, Ray and Gaban must have far stronger move than GV Kaido weakass bolo breath and perhaps GV BM too, and logically make more sense if they replace them.
But Oda stick to his formula and decides 3 future Yonko + Xebec + Garp + Roger attacking Imu together as it looks more epic and tells audience "Look 5 strongest pirate + strongest Marines can't do nothing to Imu"