I already said it before, these 100 Chapters are to One Piece Endgame what First 100 Chapters were for Grand Line,
I said that Imu is basically Don Krieg of Final Saga, He claimed himself Strongest by possessing Greatest Military Power (Weapons & Army),
Imu arrived on Elbaph through Gunko in Chapter 1150, so expect Chapter 1200 to have another similar Major Introduction/Reveal,
We will have someone who instead of having Access to All Weapons, He got Access to all Creatures, basically Kars (From JoJo) of One Piece,
So for these remaining 10 Chapters, Oda will probably slow down, either by restricting Imu somehow or making him take his time with Gaban, since They got a lot to talk about, meanwhile, We'd have Zoro vs Sommers & Sanji vs Killingham + Gunko Sub-Plot + Library Sub-Plot + Giants trying to help in any way possible,
It's similar to when Luffy's 1v1 against Kaidou on Rooftop ended so quickly despite him unlocking Adv. CoC, and then Yamato vs Kaidou lasted an entire Volume just so can Oda focus on other Sub-Plots. Gaban vs Imu is gonna be basically like Vegapunk's Message in Egghead, it might take longer than people expect.