Option 3 tbh
Whitebeard was on par with Roger. He was PK level. Oden was WB's VC and hence Oden was likely very close in strength to EoS Zoro or at least however strong Zoro will be when Luffy finds one piece.
Therefore I don't think its really fair for Zoro to accomplish Oden's biggest feat just yet. Especially since the strongest guy he's ever defeated was Killer and not even G4 Luffy could hurt Kaido.
I think Zoro vs Kaido will be parallel to Zoro's moment with Kuma in thriller bark. Luffy will probably be momentarily out for the count, Law and Kid will be taking on big mom, and everyone else will be too weak to do anything. All that will stand between Kaido and Luffy will be zoro. Zoro goes all out against kaido, uses ISDS, uses asura, but nothing works. Kaido hits Zoro on the head with his club, Zoro stands back up, gives Kaido a one liner, and then passes out.