This Grim Reaper seems to be related to Hawkins Tarot Card
Hawkins said: "Death Card is The Annihilation Card ... it cannot Die ... it will be Revived"
Then he said: "Show me The Result of this Battle? The Tower !"
Author explains: The Tower Card signifies "Great Change", an upheaval of the established Order, its hidden meaning indicates:
"The Opening of New Path"
In other words, all of this means:
01. Zoro represents "Annihilation"
02. He cannot Die (His Role is Unfinished)
03. He will he Revived (He will be saved from Mink's Drug)
04. His Next Battle will bring "Great Change" (Saving Wano)
05. He will Open a New Path (Use your Imagination)
It's ironic how that Chapter was thought to be about Kid vs Big Mom
But guess who saw The Grim Reaper instead? It's Zoro
Guess who is close to Dying & needs to be Revived? Zoro again
Annihilation is coming (Both in Manga & Haters Fanbase)