I can't really imagine saying "the next couple is Rupert Psmith and Violet Elizabeth Bott", it needs to be "are". It depends whether you consider them as one unit or as two. Brangelina might have been one unit, but most couples, even married ones, are still two people.
It is more complicated than many make out. You need to consider whether a collective noun in context is a single entity or a collection of individuals.
1. This team is the best in the competition.
2. I expect them to win a lot of medals.
To say that just because a collective noun is singular in form it must always be followed by a singular verb or pronoun is plain wrong. Check with Fowler if you don't believe me.
elliemay you are repetitive in repeating that you are right throughout the thread - I'm not sure why you are so self assured when there is vast evidence to the contrary.