I'm for Are.
The drama intensifies, and love is in the air. ______ any of them going to marry her? Watch and find out.
To me, "is" (not "are") is correct and natural in the above.
I'd rather see "Is one of them going to marry her?" or "Will one of them marry her?"To those who think that only "are" works, consider this:
A review of a film about a group of friends (a few males and one female) and their complex relationships.
The drama intensifies, and love is in the air. ______ any of them going to marry her? Watch and find out.
To me, "is" (not "are") is correct and natural in the above.