But that's not how the existing license works, so who cares about any new GPL license? Unless you explicitly said "I want my work under the GPL or whatever craz

But that's not how the existing license works, so who cares about any new GPL license? Unless you explicitly said "I want my work under the GPL or whatever crazy new version of the GPL ever exists", with the extra detail that the GPL is designed by a business competitor who is jealous of your success. It'd be crazy.