Lots of things can open up the sword lore plot line back up tbh
- The possibility of zoro getting a new sword
- Shodai in general
- Momo potentially getting nidai
- Maybe eventually getting habakiri hype
- Asura eventually getting explained whether or not it’s actually tied
- Zoro vs shiryu if wado becomes relevant
- Learning about black blades
- Learning about yoru
- Hakuba maybe
- Nasjuro maybe
The door definitely isn’t closed yet
Like will all those things lead to sword lore idk maybe not but some of them should. Similar to how we have yet to get a real explanation on Sanji’s fire powers. There have been multiple opportunities and it’s probably tied to sora/science but oda is just saving it for later for better or worse