Oda is clearly hinting at the one who will deliver the killing blow to Kaido!

1- Necessity in Kaido’s Death

2- Zoro’s character arc/motivation

3- Kaido is the real target, not Orochi

4- Enma and how Zoro inherited Oden’s will

5- Ryuma 2.0 and becoming the monstrous samurai Kaido is waiting for

6- Vivre Card Statement

*Theory by ashuraichibugin