I have the feeling Oda to pay intention to fan comment.
First he boosted Killingham and Sommer with Omen but some still doubted.
Now he gave them legendary artfact
Awakened Killingham + Omen + Spear of Command that should easily push him at Low top tier.
Even if Sanji awake advcoc if itsnt stron enough he would still get destroyed.
Then Zoro is facing Sommer against whom even top tier couldn't put down successfully his base form, gaban previously failled even with 3 or 4 attacks and luffy with his second strongest move in g5 finish him or make him even loose conscious.
Then he got omen,can sommon black wings, there murst also be his awakening which we havent seen yet Then there is the sword of wrath which already got feat against dragon loki and Stalemated his named attack in a direct clash without loosing an inch.
We are about to get peak fight, now I'm certain, bounty will jump very high for Zoro.