I will suggest Nordeus as did Pokerstars with the Valencia FC ex-GK Santi Cañizares, add a way to face a team managed by a famous personality and in some fair and equal conditions.
Lets say that the abandoned teams of the top servers can be converted in a "family acting as 1 club" using orders/instructions of a famous active or retired player or coach.
I would really have the manner to face a team set for some Spanish semi retired coach as Javier Irureta that won the League with Depor, or Jupp Heynckes... or Ronaldinho or Ibrahimovich....