Abstract-- It is expected from a Future Internet that a multitude of networks will coexist and complement each other. Such environment allows to run specialized networks possibly provided by different operators to run in an isolated manner on the same infrastructure. Moreover, the infrastructure can evolve independently from network specific technologies. Network virtualization is considered as the key technology for future mobile and fixed Internet based networks supporting the establishment of such coexisting networks. It provides dynamic resource allocation and scalability on top of a substrate to reduce the time and overhead required to introduce new networks and services. The objective of the COMCON (COntrol and Management of COexisting Networks) project is to design novel control and management mechanisms that support the coexistence of networks in a future networking scenario and to illustrate the economic advantages. In this contribution, we present six use cases defined in COM...