The 23-year-old had found himself pushed down the pecking order at Old Trafford, with Robin van Persie and Wayne Rooney the first choice striking duo for the Red Devils in recent years. The addition of Falcao only served to show that Welbeck wouldn't be getting much first-team football this season under new manager Louis van Gaal, and a loan move to Tottenham had been mooted.
However, England international Welbeck has finalised a shock £16m move to Premier League rivals Arsenal, where he will surely be the Gunners' first choice centre forward in the absence of Frenchman Olivier Giroud, who could be out until 2015 with a broken ankle.
Upon his arrival at the Emirates Stadium, some Arsenal fans were concerned that Welbeck wasn't the man to improve their attack given his record of just 34 goals in 150 games for United, though many others did appreciate Welbeck's athletic ability and fantastic work rate.
In fact, the situation can be somewhat compared to when Daniel Sturridge left Chelsea for Liverpool in January 2013. Sturridge had been playing for a title challenger but rather than being given the chance to play as a centre forward for the Blues, he was pushed out wide - as Welbeck has been regularly at United.
Just 15 goals in 55 games made people question Liverpool's decision to fork out £12m to bring Sturridge to Anfield, but the chance to play up front on a regular basis, Sturridge has hit 36 goals in 52 games to establish himself as England's top striker.
Welbeck will now get the same opportunity as Sturridge - to play as a centre forward. If he can replicate what Sturridge has achieved, then Arsenal's move to sign Welbeck will be completely justified.