Vegapunk never actually finishes his explanation about the Will of D in the manga, so what he “was going to say” is still unresolved and open to interpretation.

Below is what is known from canon so far and what most theories build on.

What Vegapunk Actually Says

Vegapunk’s broadcast on Egghead mainly focuses on two things:

  • The world is going to sink , with sea levels already rising after the destruction of Lulusia, implying Ancient Weapons are active.
  • His “Mother Flame” energy source was stolen and used to power one of those weapons, which he considers one of his great “sins.”

At the very end, he turns directly to the people with the name D and says something like:

“Those who bear the name D… among you is… A—”
before the transmission is abruptly cut off.

So the key point: he clearly intended to reveal a crucial truth about the people of the D and a specific “one among them,” but it is intentionally censored for both the in‑story world and the readers.

Two Main Theory Lanes

Because the line cuts off, fans have to speculate. The most discussed possibilities are:

  1. A chosen savior / new Joy Boy
    • Vegapunk may have been about to say that among the D is a special individual destined to bring about a massive change to the world, essentially the reincarnation or successor of Joy Boy.
 * This naturally points to Luffy, whose actions and the Sun God Nika connection already position him as the “joyful liberator” figure.
  1. A traitor among the D
    • Another strong theory is that Vegapunk was about to reveal that among the D there is a traitor or collaborator who sided with the World Government in the ancient war, causing the fall of the Ancient Kingdom.
 * This would explain why the government fears the D yet has historically tolerated certain Ds (like some nobles or marines) and might add a tragic twist to their inherited “fate.”

Most discussions today treat these two as the most plausible directions: either Vegapunk was going to confirm the chosen D who will fulfill the ancient prophecy , or expose a D who betrayed their own people , or possibly both in contrast.

How This Fits the Will of D

Putting this into the broader “Will of D” context:

  • The Will of D is already implied to be an inherited will from the Ancient Kingdom, carried by people who oppose the oppressive order of the World Government.
  • Vegapunk clearly knows more about the Void Century, the war, and the Ancient Weapons than almost anyone alive, so his comment to the D-bearers is likely tied to:
    • Their role in the previous war.
    • Their role in the coming cataclysm and world change.

So, while the story has not yet told readers explicitly “what Vegapunk was going to say about the Will of D,” all current official material supports the idea that:

  • He was about to reveal the special destiny or danger associated with the D-bearers.
  • He was specifically pointing out that “among you” D’s, there exists a key individual linked either to Joy Boy’s return or to a historic betrayal that shaped the current world.

TL;DR:
Canonically, Vegapunk’s message gets cut right as he starts to reveal something crucial about the D people, so the exact statement is unknown. The strongest grounded theories are that he was about to identify either the destined “Joy Boy”‑like D who will change the world, or a traitorous D whose actions doomed the Ancient Kingdom, both directly tied to the mysterious Will of D.

Information gathered from public forums or data available on the internet and portrayed here.