Could the best two players in the world really swap Spain for Manchester?
Over the last five seasons the Premier League title has been won twice by each club (and once by Chelsea), and both are in the mix to lift the trophy again this time around.
Yet could major work be going on behind the scenes at both clubs, which would take the rivalry to a whole new level?
There is a possibility that the world's best two players, Lionel Messi and Cristiano Ronaldo could be lining up on opposite teams for the two clubs, and would instantly make the derby the most watched game around the glove.
Manchester City's transfer ambition is no secret. SkySports reported via Guillem Balague last week that City are keenly trying to persuade Lionel Messi to make a world record move to the club.
Then this week it was announced City had secured a huge £265 million investment from Chinese businessman, suspiciously looking like an amount which could have been deposited in order to finance a move for the Argentine. The Manchester Evening News posed the question as to whether the investment is 'Messi Money'.
On the other side of Manchester, if City were to persuade Messi to leave Barcelona to join them, there would only be one way to respond.
This would be to pull the trigger on a much discussed possibility of re-signing former superstar Cristiano Ronaldo, who unlike Messi has shown previously he can be a superstar in the Premier League.
SkySports reported last month that Ronaldo 'still dreams' of returning to Old Trafford from Real Madrid, and the option received possibly the biggest possible boost this week, after his mum stated she felt they were the best choice for him if he were to leave Real Madrid, The Mirror reported.
The prospect of both players taking their own personal rivalry to Manchester is a mouth watering prospect, and would be huge for the Premier League, and devastating for La Liga.
As for who would be better off, the answer may lie in who will make the bold move to fire their current boss and appoint Pep Guardiola, whose contract at Bayern Munich runs out at the end of the season.