Interaktives Städtetheater
See Picture-Description for Translation please!

Solution

ALL PICTURES ARE ONLY EXAMPLES TO POINT OUT MY IDEA!

One piece of theatre is being shown in different cities with a big screen. So all scenes can be modified and used to become one great theatre piece.
For example: Forrest scene in Stuttgart, Big City scene in Berlin, heaven-scene in Augsburg
This way 3 cities perform at the same time!

UPDATES WILL FOLLOW - PLEASE SEE PICTURE DESCRIPTIONS FOR TRANSLATION!!!