Flawless corkscrew moonsault

Some of it is. Some of the wrestlers go into the match and just wing it. Some of them plan the entire thing out beforehand.

In general, PPV matches are highly choreographed. Regular matches aren't as intensely choreographed, but the major spots are. And it is still scripted: the winner is determined before
the match. Though sometimes wrestlers may go off script If they feel the crowd won't accept the scripted ending.

That is still an amazing move, whether the winner of the match is decided before or not.