The current line-up looks very strong but there is every chance it could get even stronger still, with reports linking Man United with a host of centre-backs, strikers and a certain Pedro Rodriguez from FC Barcelona.
In terms of building a team that is capable of competing on all fronts next season, Louis van Gaal has taken a big leap towards that with some fantastic signings but is there one player who fans feel is the stand-out new addition so far?
We asked our Twitter followers for their thoughts on United’s most important signing this summer and who they think will have the biggest influence on the team.
@PeoplesPerson_ Schweini, because we've been missing a leader on the pitch, also because of the qualities he brings to the midfield
— Marwan El Prince (@marwanprince) July 20, 2015
@PeoplesPerson_ surely Schneiderlin. He showed some glimpses what exactly we missed last season. He is the destroyer we required very badly.
— Athul Krishnan (@athulpkr) July 20, 2015
@PeoplesPerson_ Basti. He will dominate games for us and will be crucial in big games. his experience, leadership & ability will be key.
— Daniel_C (@Danny_Cent) July 20, 2015
@PeoplesPerson_ Undoubtedly Schweinsteiger if he is fit for at least 75% of the games. His experience and skill level is different.
— Vinodh (@BoredCricketFan) July 20, 2015
— Barry Stott (@BarryStott) July 20, 2015
@PeoplesPerson_ Basti signing signals intention to opponents and prospective players. His impact on youth will be major too.
— mphrmph (@mphrmphmphrmph) July 20, 2015
@PeoplesPerson_ immediately its darmian & basti.They fill key positions we have been lacking. Also basti brings leadership & experience.
— Candice J. (@candice_dedier) July 20, 2015
@PeoplesPerson_ All 4. Memphis pace & goals. Schweinsteiger leader, Darmian RB who defends and attacks, Schneiderlin reading of the game
— Melvin S7ven (@MelvinS7ven) July 20, 2015
@PeoplesPerson_ Schweinsteiger, knows how to kill off teams and slow everything down if needed. Just does anything to win.
— Der FußballGott (@FutbolFinn) July 20, 2015
@PeoplesPerson_ 10000% Schneiderlin. The Matic, the Toure of our team. Strong, possession holder, wall and ball player.
— Serge Adam (@SergeMUFC) July 20, 2015
@PeoplesPerson_ Schweinsteiger because he's the best midfielder we've had since Scholes
— Ryan (@the_speedforce) July 20, 2015
You can certainly understand their argument. Schweinsteiger will bring experience to the team that no other player can; he has earned over 100 caps for Germany, scored 23 goals and played for Bayern Munich for 17 years.
He is now one of the most decorated players at the club and there couldn’t be a better player for everybody to look up to than Schweinsteiger.
It’s good to see Van Gaal has focused on areas where United lacked last season and so far the overhaul has been very successful. If the final few pictures of the jigsaw can be put into place, you’d have to consider it a failure if United weren’t competing on all fronts next year.
Who do you think is the most important signing so far this summer by Manchester United?