Chill, all.
City spunking 500 million (or whatever) of NEW money will change football.
Predicting how it will change football is a reasonable thing to do - and holding the opinion that it is a terrible thing that will destroy the game is a reasonable opinion to hold. There's nothing to say that any media source has to justify the opinion that we are football's apocalypse - in general they never bother justifying anything.
In my opinion, what will happen is we will win trophies and titles - and the current winners of trophies and titles will win fewer of them. What would be bad for football is if we won ALL the trophies and titles over a long period of time.
But I've no wish to silence / attack opposing opinion that thinks the sky might fall in. (see what I did there).
I'd be interested to read an article or two on how it might all end. If the plans all work out, come 2020, do we agree to let other teams win occasionally?