Unless Chelsea slip up in their final game tomorrow, it looks like we will be in the highly unusual situation in which the top three teams in the Premiership will all begin next season with a brand new manager. Add sixth-placed Everton to the list and it's four out of the top half-dozen.
Roberto Mancini
Admittedly, David Moyes taking over from Sir Alex Ferguson at Manchester United is more a case of passing the baton but there's a little more uncertainty about what will happen at Manchester City and Chelsea.
The biggest shake-up was Roberto Mancini being booted out at Eastlands, exactly a year to the day after his biggest triumph, when City clinched the Premiership title in such dramatic fashion.
The dismissal certainly came as a surprise for Mancini. In the middle of February, following rumours he could be on his way out, the Italian commented: "All the people who talk about this dont understand football because if Manchester City should sack me, 20 teams in the Premier League should be without a manager."
According to the Daily Telegraph, Mancini's departure was greeted with "delight" and "relief" by the players, although none would actually say so.
Mancini's public criticism of such players as Joe Hart, captain Vincent Kompany, Samir Nasri and Micah Richards, certainly did not endear him to the players or fans alike. Some of his training methods were also unpopular with the players.
Clearly happy to see him go was City's former kit man, Stephen Aziz, who tweeted that Mancini was arrogant, vain and self-centred, adding he had no manners and was ignorant. Not exactly an endorsement of the gaffer.
However, Mancini seemed to still have backing from some fans if the 'Grazie Mancini' signs visible in the match against Reading were anything to go by.
There was a weird period when after a bad run of results, Mancini banned any of his team from wearing the colour purple, which he felt was unlucky. This was particularly bizarre as City's official tracksuits had shades of purple and, under Mancini's orders, the team had to find alternative tracksuits.
At least during his time in England, Mancini made an effort to learn the language and he had already mastered "squeaky bum time" and "taking each game as it comes".
The situation at Chelsea is, as usual, quite fluid. We have known for some time that "interim manager" Rafael Benitez would be leaving at the end of the season.
After securing Champions League participation, winning the Europa League on Wednesday, was simply the icing on the cake for Benitez.
Considering the childish treatment from an element of Chelsea fans throughout the season, the Spaniard can leave Stamford Bridge with his head held high. He has displayed considerable dignity throughout his tenure and some of those fans should be taking a close look at themselves.
It would be nice to see the Chelsea supporters publicly express some sort of gratitude to Benitez in the coming days for his efforts. They don't have to like him but at least respect him for what he has achieved in the most difficult circumstances. It's no fun being booed by your own fans.
There are signs of hope. Benitez was actually applauded by some Chelsea supporters as he posed on the pitch with the Europa trophy. "I could see everyone was happy, so I was happy too," Benitez said.
At the time of writing it has still not been confirmed who will be stepping into the hot seat at Manchester City and Chelsea , although it looks likely to be the Chilean, Manuel Pellegrini and Jose Mourinho respectively. Pellegrini insists it's not a done deal yet, so let's wait and see.
Mourinho's appointment would undoubtedly be welcomed at Stamford Bridge but Chelsea fans should be a bit careful about what they wish for. A manager returning to a club is not always a great idea and the prospect of Jose picking up the magic from where left off involves a lot of wishful thinking.
There is no question that Mourinho was the most successful manager in Chelsea's history, winning six trophies in three years. But he suddenly left in Sept 2007 by what was euphemistically called 'mutual consent', meaning he had a big row with owner Roman Abramovich.
In the eyes of his boss, Mourinho's style of play was too conservative and not that exciting to watch. Roman wanted his champions to be entertaining.
One group who would definitely welcome Jose back with open arms are the journalists. He was so different and always made a good story even if what he said was total twaddle.
What we know is that Moyes will be in charge of United. It is a considerable challenge with Fergie's shadow hanging over him.
Opinions are divided on whether Moyes is up to it but most seem to think he should be given the opportunity. He's on a hiding to nothing as he can't achieve anything like the success of his predecessor.
Before the season starts hes got the not-so-minor problem of what to do about Wayne Rooney. Moyes has already tried to smooth troubled waters by speaking about Rooney's "exceptional talent".
But one suspects he hasn't forgotten what Rooney (or his ghost writer) came up with in his book My Story, So Far about his move from Everton: "I'd have gone almost anywhere to get away from David Moyes."
Best of luck sorting that one out.