He'll be replaced by another coach who either a) lacks experience in general, b) lacks experience in dealing with players of this calibre and/or football at the highest level c) Isn't resilient to the pressure at the club and fan expectations d) has no clue about offensive, posession based football.
Feel free to combine a-d at your leisure.
There's only one suitable coach for this team, but the bald ̶f̶̶r̶̶a̶̶u̶̶d̶ hero isn't coming back.