It's true Ame has been irrelevant since it was first introduced. The second Momo rejected that sword told us the chance of us seeing that sword used to slay Orochi was low.
While Zoro situation is completely different.
During the war, Oda built up Zoro's connection to Ryuma, the legendary samurai who slayed a dragon above the capital.
The only way for Wano to see Zoro as the next Ryuma would be for him to recreate one of his legendary feats. Currently the only feat he could recreate would be to kill a dragon above the capital.
Right now, Zoro and Kaido (dragon) are close to the capital. Even the world government has showed up. That is important because they also witness Ryuma's strength and it's because of his strength the world government feared samurias and left Wano alone.
Just because Zoro doesn't have a magical fruit that gives him everything and brings him back instantly doesn't mean his plot in Wano is over.
Zoro plot with Death us not over.
Then there Kaido who mention awakening but hasn't given us any indication that he's currently is using it.
If he has awakening and not using it, which none of us knows for sure, than the change of Kaido being defeat at the end of this chapter or beginning of next is slim. He will still need to show that power.