Interesting proposition. Consider :-  20 plus odd years ago perhaps more, Liverpool were the unasailable giants of football sweeping aside all oppositions. Liverpool are still a good side but without much of the kudos they once possessed. Chelsea could tell a similar story I suspect, although they seem to be trying for a comeback in recent times. Nothing lasts forever and Manchester United are looking less than immortal at the moment. The obvious shock that the semi retirement of  Sir Alex's has caused within the Manchester United castle is really interesting; it's really beginning to look like the wheel's are falling off. Conversely and covertly Manchester City seem to be in the process of buying the premiership with a seemingly never ending supply of money from the Middle East.. Football is a funny old thing and always seems to live by the adage "The King is dead. Long live the King" but who's the King going to be this time ?