What happens when a media company becomes too big to fail?

I honestly do not like the idea of Disney buying Fox because it just means more media is now in the hands of fewer people and that can be a dangerous thing when one considers how powerful the media really is. A certain point of view or agenda could be put forward in such a wide way that it could reach and influence how people perceive things. What happens when the entertainment industry becomes too big to fail? Look at how certain networks only present a liberal point of view while others only present a conservative agenda. Things seemed more objective back in the 1970s and early 80s. Disney buying Fox would make it too powerful in my opinion and I am not comfortable with anyone or anything owning that much. I hope it never comes to pass.