I think it was 2015 or 2016 when momotaro theory was first written. I haven't been convinced since then. Because we had momo , monkey and bird . Before Onigashima started, when Zoro was given enma, the more valid theory for me was that Zoro killed Kaido. Until Yamato was introduced to us. A character so independent from the story and unintroduced throughout Wano could only have one purpose. Of course, Oda wanted to do the Momotaro story. I've been saying on this forum for 3 4 months that this is impossible.
But, relentlessly, some Zoro fans have always acted on baseless and only clues they've seen. The result is a huge L .
Congratulations :)