Answer:
This event most likely affect the play "As the complicating incident, it creates tension about whether Claudio and Hero will get together as a couple."
Step-by-step explanation:
In William Shakespeare's "Much Ado About Nothing" Don John is the principal creator of chaos and conflict, since the story is funded in the idea of a betrayed Claudio and this is the first event when the reader starts to see the relations between Claudio and Hero as an impossible one when everything appears to work against them.