I wish others would comment on the nuns. I have been reading about them on another site. It is strange to me as well. There is just to much hoopla out there in the Novus Ordo press, "Schistmatic Nuns Return to Church." I smell something fishy.
It reads almost like a joke. They witnessed the 'Muslim-Pope', the Assisi-Pope, the massed-'masses' Pope, and so on, as a casket, and were moved to renounce their Catholicism?
I'm sure the same happened in Campos, or with the crowd that forced the FSSP to stop questioning the Roman Protestant way of doing things. Or not.
I think the challenge for Catholics isn't such ridiculous stories as this, but the uncharted territory of what to do when one realizes - they aren't giving it back. No St. Peters. No Notre Dame. No Vatican library. No local cathedral that your parents literally helped to build. You don't get that back, either.
What comes next, then? Is a council to be called? Does the situation, presently, really allow for it, or must more be winnowed away from the middling orders like the SSPX. I think that's probably it. But at some point, with greater numbers, with perhaps hundreds of parishes, thousands of Mass, and a good number of bishops who all can agree have legitimate orders, it's going to be time for a council.
A Pope will have to be elected. And so the test for Catholics will be, can they imagine themselves Catholic without the Vatican, without the tapestries and statues, without the great cathedrals, without the places which even have indulgences attached? and with the Roman Protestants constantly demanding that they own the trademark on the name, Roman Catholic. Catholics will have to build upon what they have, in a post-Christendom world. That, too, could prove a very difficult challenge.