It’s “been coming” for the last year.
I’m starting to wonder if these guys have heard of the story “The Boy that Cried Wolf”.
Besides, Fr. Z has been extremely careful about what he is reporting. Within the last week or so, he has been given credible reports about the document passing through the Office of Latin Letters, and to the printer; from living in Rome, he has connections to people who actually work in these various offices.
The pope has been trying to lay the groundwork. From why I can gather, the pope is doing what he thinks should have done after 1969, which was to gives priests and laithy a choice between the old and new forms, rather than having the Reformers ram it all down the throats of everyone. Many of the zealots who did so are now in high office and they are NOT happy.