UFC are being quite nice to McCann. It's quite apparent that Dana has a soft sport for Molly. (he has made comments in past interviews etc).
McCann has lost 2 of her last 3 fights, specifically 2 losses by submission.
Brasil has also lost 2 of her last 3 fights.
But the key thing here is Brasil, by her fight record, is not a submission merchant.
So I conclude that UFC consider that Brasil is not much of a sub threat to McCann and they do want a McCann victory so....yup.... I'll say McCann by TKO/KO in rd1 or 2.