Cloud got leaked by a guy on ResetEra, but no one actually believed him because lol it's Cloud.Yet there wasn't a peep about Bayo, or Cloud, or any of the DLC really besides Roy and Ryu who were leaked by Nintendo.
This can be explained by times changing I'm sure but it's very odd.
I'm not remembering much of the DLC speculation because I wasn't here. But that was also DLC that was decided on after the game was done, so the full team likely knows the characters. DLC dev teams are smaller, so it would be harder for Bayo/Corn/Lucas to get out, but I still feel confident in saying it happened due to my understanding of how the industry works.