I dont know about you guys but I hate both Monsters animations and this incoming Zoro novel.
This is obviously Oda's attempt to redeem himself for failing hard in Wano when it comes to Zoro's lore.
Fuck his petty attempts, as long as he doesn't properly develop plot lines for Zoro, IN MANGA, none of this matters.
He has a chance to tie things up with Ryuma-Venus-Koushiro-Zoro and if he fails there, don't expect any lore.
I understand the sentiments of yours as a fan but oda clearly trying to milk it.
Zoro is second most favourite character in Japan after luffy.
In some regions, zoro's popularity might be more than Nika
Luffy gets fleshed out in manga - so no need of another novel for him.
A Zoro novel would mean more cash cow for oda just like how ace novel came in the first place - because of Ace's popularity.
There is no attempt to redeem but to make money.
And, it's possible oda deliberately left zoro's plot unaddressed because he already had plans for a novel.