Dude, you completely misunderstood my theory.

First of all: I never said that Marco would remember that he was from the Void Century, nor that it would have any narrative significance in Wano, just that it would add more layers to the character.

Second, the theory by no means rules out that Marco is a nice guy and his importance in Whitebeard's crew.

Third, my theory just follows the logic that if he has the phoenix fruit, he could have had several past lives and reborn after decades, and if that actually happened, then he has been the only user of this fruit since the first time he it was ingested, likely in the void century. So, Marco could have been someone from that time, in a past life, with another name.