As an English Premier League supporter, the reason I fear Man City is simple. Money. The manner in which they've splashed money about on transfers and wages is equivalent only to the height of the Real Madrid Galactico era. The only saving grace is they've spent it somewhat unwisely, apparently thinking the route to the Premiership goes through defensive midfielders and not-quite-elite strikers (with the exception of Carlos Tevez).
Manchester City is on the verge of becoming THE superpower in World Football. And being a Man Utd supporter, it hurts and scares me to write such a thing. City's vast pockets and financial backing has put them on a footing similar to that of Apple in the MP3 player market. Everyone knows of Apple's incredible reserves of money, resources, manpower and creativity in delivering services yet it remains unspoken, almost a taboo subject for fear of offending them – with the information Apple has the ability to collect, they could really mess with you.
The parallels are stark: Manchester City has incredible reserves of money, resources beyond those of any other football club and manpower in the shape of Carlos Tevez, James Milner and David Silva. The only thing they're missing is methodical creativity, which I'm sure they'll purchase next transfer window. The backing that these two entities have allows them to be major players – almost inevitably the major players – in their spheres of influence. If it were Real Madrid, Liverpool or even Chelsea rather than City holding the cards, I wouldn't fear so much – they have all been a big fish. City doesn't have that experience and their attitude over the past two years hasn't been a picture of a controlled, powerful figure but more of a baby brother who's all grown up and immaturely throwing his weight around.
I am in no way suggesting that Apple is using their clout in any way that's not perfectly respectable or legal. Nor is City. The rules as they stand allow teams to have financial benefactors who pay for the best players. That they've seen fit to employ players like Patrick Vieira is a boon to other clubs, but I'm sure in a year or two you'll see Manchester City's oil-fuelled rampage to the top of the Premier League end with them crowned Champions, surrounded by the twitching, dying, debt-ridden bodies of the Old Guard Liverpool, Arsenal and Man U.
The King is dead. Probably. Long live the King. Damn.