A better question would be: "Will the fights start by the 1000th chapter".
Doubtful imo. I feel like there are a ton of things that need resolving in terms of subplot:
- Franky and the Numbers
- Apoo and the antidote, and wherever that leads Zoro
- Wherever the fuck Chopper, Brook, and Robin are grouping off too.
- Finalizing Yamato's actual battle and where it leads her
- Getting Carrot to fight Perospero
- Finalizing Nami/Usopp's fights (i don't think its that solidified yet, just a means of distraction)
- Actually getting Luffy to the top, however that happens.
Going to take some time and thats only the main crew + Yamato/Carrot. Id say we are going to be dealing with this partially into Act 4. Act 3's end may be signified by the Scabbards losing.