What lore? Zunisha was the most obvious choice...and its still same...idk why it was hype.
Zunisha being in Wano presents a lot of implications. As you said, it can even be connected to ancient weapons who knows. We're sure to get some amazing lore.
- Zunisha's purpose here and if he's just here to save the capital or something else too.
- Probably knowing why Zunisha was punished so again massive lore drop.
- I wanna see Kaido's reaction to Zunisha too considering he knows about some stuff related to Joyboy and if the legends have been known to the Gorosei so probably him too.
- A big possibility of us getting glimpses of the past from Zunisha's perspective. More so, if it sacrifices itself for Wano or smthn. Tho I want it to be there for the final war tbh.
And lastly, just having a gigantic elephant on the battlefield is fucking cool.