Well, that's another problem with their proposition, mainstream or not, it can never be verified. And, this is why they always speak in ambiguities, just so anything fits their description, just like astrological predictions.We can only know if their prophecies are true if they come to pass, which is recorded in the bible: Deuteronomy 18:22
"When a prophet speaketh in the name of the LORD, if the thing follow not, nor come to pass, that is the thing which the LORD hath not spoken, but the prophet hath spoken it presumptuously: thou shalt not be afraid of him."
That's the case, and some will take a dream which is metaphoric or symbolic and even when it doesn't come to pass they say it has. But liternal prophecy is easy to discern. Because if it doesn't happen then it is not from God. A good example of this craziness is of course end prophecies: List of dates predicted for apocalyptic events - Wikipedia
These prophecies seem to be mainstream. Or did I get that wrong?
The evidence is clear that they are false, they have only repeated what is already known and foreshadowed from Scripture, but just spun it in their own words, or related it to a current event. Even a monkey can do that.