The PIF boast total estimated assets of around £320billion, which would dwarf that of Manchester City’s Sheikh Mansour, the deputy prime minister of the United Arab Emirates who has pumped over £1.6bn into the club across 12 years.

Mansour’s fortune is around £23.3bn and the City chief was previously the wealthiest owner in the Premier League, but will fall to second once Newcastle’s takeover is completed.

The Magpies’ new bosses are expected to pump plenty in as the north east club look to end a 51-year wait for a major trophy – having finished higher than 10th in England’s top flight just once since 2005-06.

And Campbell fears the huge sums of money available to Everton and Newcastle could see them become major forces.

Speaking on the Football Fans For The NHS charity live stream, Campbell said: “No, no chance [they’re not coming to mess about].

“Look one thing I do know, I’ve been so privileged to go around the world and meet different people, Middle East and all that kind of thing. They want to win.

“They see the Premier League as the golden league. So if they’re going to get involved, they’re going to want to make a huge difference.