Hi, here’s my theory: the battle will now unfold around Sanji and Zoro. If those two knights are linked to Imu, it might be possible to weaken Imu by taking out his knights. Brook will likely kick things off by retrieving Shuri; this will weaken the omen affecting the other two, allowing the Straw Hats to shine there as well. The result will be a weakened Imu forced to retreat to the Holy Land as his military might crumbles.
Right now, no one can defeat Imu, but he might just learn what it feels like to bleed 😅.