Wano hasn’t even been its own Marineford yet, let’s pump the brakes on this. MF didn’t take 70 chapters of buildup to get to the crux of the issue, and while Zoro’s done (and received) some constructive stuff, we’ve still got a ways to go before he can fully claim the spotlight.
Redundant development. Zoro met the strongest swordsman early in his journey in order to humble him. He knows what the top looks like. He doesn't need to be reminded how weak he is. That's why he constantly trains.
Stop thinking in terms of "Ls" and "Ws". What part of the Wano arc demands Zoro personally lose? Does he really need to be reminded how "weak" he is? He's not arrogant. From the recent chapter alone, Zoro recognizes his and his allies' limits. As well as the dangers the New World offers.
If you want Zoro to lose so badly, find a stronger justification for it than this tired misconception of his character.
Second, how and why should Koshiro arrive in Wano? Koshiro has expressed no desire to travel. The last time we saw him, he was still busy training at the Isshin Dojo.
This was from a cover story not long after Dressrosa. Not that much time has passed in canon, and Koshiro doesn't appear in a hurry to sail out.
Now on to the meat.
Your entire thesis is based on Zoro struggling during Wano, then proceed to make baseless speculations on why he will fail due to that.
I don't want to delve into everything Zoro's done on Wano, but this is a war the Alliance MUST eventually win. Zoro is one of the frontline fighters. Should he fall, that will represent a huge loss for them.
But let's look at these "Ls" Zoro's received.
Where did Zoro fail here? Because he was injured? Hawkins is a Supernova. I should expect him not to be a pushover. But from Zoro's little clash, his main priority was saving Tama and being introduced to O-Tsuru, Kin'emon's wife. The injuries Zoro received from Hawkins were negligible compared to those aforementioned developments.
I fail to see how this was in anyway a loss for Zoro. He factually defeated his opponent, who was another Supernova, while having to deal with another enemy. He managed to save and meet Toko, Yasuie's daughter, and Hiyori, Oden's daughter. Zoro's injuries vs his Supernova opponent were once again minor in the face of these plot occurrences, which segwayed to the more important development of witnessing Yasuie's execution. Yasuie's death would become a major basis for Zoro's motivation going into the war.
We will wait and see how this unfolds. However, how the chapter concluded, Zoro and Luffy were used to build up Apoo for his forthcoming bout with Kid. Not a means to foreshadow some isolated defeat for Zoro.
Stories have high and low points, but it's the larger picture you need to look at for serious analysis. So Zoro getting bruised and cut isn't good enough to conclude he is setup to fail.
Let's examine the first thing Zoro did on Wano. He struck down the crossroads killer/magistrate, who not only framed him, but who was terrorizing the citizens' of the capital.
Zoro's actions were that of defiance and justice, as demonstrated in the code of bushido. However, he was branded a criminal all throughout Wano. The people of the country believe he to be a dangerous murderer. Yet his actions helped them in the end. This isn't a setup for failure, this was Zoro's very first act of heroism within the country of Wano. Those who laid witness to him and know his character recognize him as a strong and honorable warrior. Roll call:
They have all been either helped by Zoro directly or have entrusted their hopes to him and his friends to succeed in the now more important mission of liberating Wano. If Wano ends with Zoro being the only one who fails on his end, he'll have betrayed their belief in him. And author's intent suggest he won't, as the people of Wano need their country to be liberated. Since Zoro is a large and visible figure in the operation, he represents those who are acting on Wano's behalf.
Seeing how most of the comments is just Zoro vs Sanji fanbases bashing each other along with OT happily indulging it with the iffy opening comments, this really is looking like a bait thread. Come now...none of you are proving a point with these pointless threads and comments.