Given that ISO20022 (MX) contains thousands of message types already, it certainly wouldn't be surprising to see a few more appear. In addition to that, SWIFT

Given that ISO20022 (MX) contains thousands of message types already, it certainly wouldn't be surprising to see a few more appear. In addition to that, SWIFT has something called MyStandards, which basically enables financial institutions to create/share/use their own message formats. Insert XKCD-927.