Taking the reins from Sir Alex Ferguson at Old Trafford will be far from easy, and it appears that it will be fellow Scot David Moyes who will be faced with that ominous challenge. (Telegraph)
The Everton boss has without a doubt been one of the leading Premier League bosses of the past decade, but it will be a completely different challenge to manage a club like United, where success is almost taken for granted.
Ferguson has left Moyes with a fine squad, with many whom are of an age where they will still improve in coming years. The incoming manager, though, will no doubt hope to bring in a couple of new faces to make the team his own, as well as to provide fresh impetus.
It may well be a case of the new boss simply signing off on deals for existing targets, while he may bring his own recommendations to the table.
Let's take a look at six potential summer targets for Manchester United's likely new manager.
With David Moyes potentially arriving from Everton, it is inevitable that attention will shift to which of his former charges could end up following him to Old Trafford.
Of those players, the most likely would appear to be long-term Manchester United target Leighton Baines.
With the Red Devils in need of a new full-back to challenge the ageing Patrice Evra, Baines has long been considered a viable option. Already one of Europe's best performers in his role, the fact that he is English also makes him an attractive proposition.
Moyes will have Brazilian twins Rafael and Fabio da Silva, Evra, Alexander Buttner and, potentially, youngster Marnick Vermijl to choose from. With top class options limited, it could well be that he turns to a familiar face.
Of Moyes' former charges, Belgian midfielder Marouane Fellaini is another who has long been tipped for a move to a top club. With the Red Devils likely to look for a central midfielder this summer, the Everton star will no doubt be under consideration.
United have been said to lack in physicality in central areas, something Fellaini would help correct. The former Standard Liege youngster, though, has the technical quality to be featured at the highest levels.
There are some who dislike Fellaini for his overly physical style, sometimes leading to an overly direct approach. Moyes, though, knows how to get the best out of the uniquely styled midfielder.
Dutch midfielder Kevin Strootman is another player that the Red Devils are said to have extensively scouted, and will no doubt take the fancy of the new boss.
A potential top class box-to-box midfielder, the PSV player will feature for Netherlands Under-21s at the European Championship this summer. United, if interested, will hope to have the move sewn up by then.
With natural footballing ability, plus the strength and stamina to complement United's Michael Carrick, the arrival of the Eredivisie star would be of immense benefit to the club's occasionally fickle core.
For more on Strootman, Bleacher Report's Sam Tighe took a look at just how he would improve the Manchester United side.
When people were writing off Manchester United in the early 2000s, the signings of young stars Cristiano Ronaldo and Wayne Rooney gave the side new hope of a bright future.
The Old Trafford crowd have a craving for bright young stars of the future, and Moyes himself is known for giving youth a chance.
They could do worse, then, than to bring in another emerging Sporting starlet, winger Bruma, and give the crowd another young jewel to cling to.
United will give Moyes freedom to have final say on potential summer signings, but that is not to say that the existing targets will not be pursued. Bruma is very much an existing target.
To compare the 18-year-old to Cristiano Ronaldo would be unfair, but somewhat inevitable. With pace and trickery in abundance, though, he may just give the Moyes era the initial boost it needs.
He is also someone who Moyes will no doubt be fully aware of given his knowledge of Scottish football, and also due to his standout performances in the Champions League this campaign.
If Fellaini, for example, were to prove too expensive, Wanyama may be the ideal man to provide strength and industry in the centre of midfield. Of course, beyond that, he is also a fine footballer.
The Kenyan has spoken of staying at Celtic Park this summer, but an offer from Old Trafford would no doubt change those plans. (BBC)
Again, Bleacher Report's Sam Tighe comes up trumps with this report on what Wanyama could add to the Manchester United ranks.
In a similar vein to Bruma, Pescara playmaker Juan Quintero would provide a new energy to the club in the wake of Ferguson's impending departure.
Quintero is a natural No. 10 with a sweet left foot, and had been linked to Old Trafford well before his starring role at the South American Under-20 Championship in January. (Daily Mail)
WIth Shinji Kagawa and Wayne Rooney already potential occupants of the playmaker role, Quintero could expect to be eased into life in England.
However, it remains to be seen whether Rooney would remain under the Moyes stewardship, given their previous high-profile clashes.
The Colombian may have a lot to learn, and will take time to adapt, but he has talent that few players could dream of.
If United want to keep moving the team forward, with long-term success in mind, the Pescara man could be a better move than more expensive countryman James Rodriguez.