Yes, it is unknown now when it will be as it is still before the return. And there are things we should yet be doing, either way. Mystery Babylon will still collapse and fall. But we who are believers are not supposed to be here staying with it.
Indeed it is thinkable that there could be possible fallen "Christians" who don't believe that will be there in that attack. But the armies there from around the world, of the godless and unrepentant left in the world, are there making an attack anyway and Jesus will return then, and foolishly they will all attack him, and be fighting God, which of course is useless. They will all fall.
Perfection that should be from us is what we should be doing, that we are meant to. There is in revelation from God such things to do with fruits from the Spirit of God that we believers should not continue to limit as they grow, with works from the love, joy, peace, long-suffering, gentleness, goodness, faith, meekness, and temperance that are to be showing from us. Sin among us will be contrary to these things.
Yeah, maybe network media might not be available anymore, after a great collapse. Jesus with power will still make himself known with his return to all those left in this world, and Jesus will reign and rule.
Mystery Babylon is the whore of Babylon refers to the great city where our Lord was crucified.
Revelation 11:8.