In the USA, the Catholic Church shall be underground by the year 2050, having been either taxed or sued (under hate crimes laws) out of visible existence. Masses will be said in people’s home just as it was around Pagan Rome’s time. (Come to my home, if I have one, and say the password to get in

)
Protestantism will either cave in to the liberal ways and follow the hate crimes laws to the letter (no more teaching homosexual acts are bad) or be taxed or sued out of visible existence as well. These will eventually come and convert to Catholicism as we both are fighting the same battle, and doctrinal issues will resolve themselves.
Eastern Orthdox and the other apostolic churches (including schismatic catholic groups) also will be taxed or sued out of visible existence. They will also come join us as well.
Eventually, this will happen in all nations except one: Vatican City. The UN will attempt to impose liberalism on the Vatican State, and it won’t do it. It will be ejected from the UN, and the Pope will clap his hands with cheer as he receives the ejection notice. Then he speaks louder about the Truth, speaking loud against sin, angering many in the world.
From this point there will be one of two ways: a revolution (where the faithful around the world rise up and fight a war) or the apocalypse.
Of course, this is just my personal opinion. It is not some revelation I had in a dream or a nightmare.