I myself just have no use for those prophecies at all. I have yet to see a prophecy that even touched on the obscene reality of the Vatican II church.
As I said, some have, and pretty clearly. As I said, it was considered so horrible that a Pope might even be associated with such. What's not clear - is what comes next, what the apostate church does, what Catholics do. There's no gameplan, as it were, in such prophecies. And they do tend to make sense after the fact. Interpretations of the same words, and contemporaneously, tend to adopt the local paradigms or incorporate wishful thinking.
The interesting thing about these isn't that each is some Revelation. None are. But these are separated by place, and by centuries. And yet these speak often the same sort of thing, in much the same wording, and putting all right in the 20th century, specifically, just so recently past. Now, you might say, they were just mulling over the same talk of an apostate church from Revelation. Or you might say they borrowed and built on known prophecy of the past. But it seems unlikely that the latter would be the case. Many are fairly obscure. As for essentially day-dreaming this when contemplating John's Apocalypse, again they do tend to speak of the same thing, in the same way.
I don't say one HAS to believe. But then one doesn't HAVE to believe in Lourdes, perhaps, or Fatima. But I see no reason not to.
You are familiar with the visions of Anne Emmerich from 1820, and so on, of course. She was one of two visionaries who partly inspired Gibson to fill in as he did in The Passion. She speaks plainly of a heterodox church following the fashions of the world. And so on. You're surely also familiar with the speculation about the true third secret of Fatima speaking about the same thing. But then, some could question the third secret, to begin with, even though many, including Popes, did take it seriously. They just didn't want people to know.
But there are many others. I refer to Yves Dupont, Catholic Prophecy, from TAN, not necessarily his commentary, which I think is a bit off, but the quotes he uses from Saints, religious and others with these visions and dreams.
In short, the Monarch and the next actual Pope sort of are a type of Enoch and Elias, someone suggested. And the timeframe could be very short between their genuine restoration and the next falling away and overt oppression. But when they make their move, is unknown. Again, it could be years, decades, or more. I would think the time is short. But I couldn't possibly know for sure. For each of us, personally, of course the time is short because our mortal lives are brief.