Where are you getting 5 soundstage houses from? If they put the mega house in 21, a house in 22, and two houses in one of the other houses that would still only be 4 houses.
That being said, may need to put TWD house further back in the park (23, 24, or The Parade Building) just to stop the cluster of fans that will flood the line for this house and, therefore, congest the whole front of the park.