At some point I thought that Katakuri is a secret revolutionary who is spying the Big mom pirates .... Don’t ask me why I also thought that Katakuri fought Roger when he came to Whole Cake Island and lost against him. During this fight he unlocked his future sight because it was the hardest fight he ever had. Roger spared him and it was never told that Katakuri lost ... good old times when I saw this as a possibility