Despite killing Kaido you would still not call him MVP? I dont think that's possible even if you want to lowball it to play it safe...
Zoro will not kill Kaido. He will cut Kaido and open his wounds, sure. But Luffy will deal the final blow. As much as I like the sound of it, its not going to happen in the same way Zoro didnt beat Lucci, Enel, Crocodile, Doflamingo...the list goes on.
Also, Luffy doesnt kill his opponents.
Have you read the last chapter?
Zoro is grouped with Killer during their attack, Kidd-Law were grouped with Luffy.
The trio dealt the last attack, not Zoro-Killer. Zoro-Killer were more like the appetizer before the main course.
Kid and Law got more importance than Zoro during the build up of this fight.