Speaking to the official club website, the £16 million signing delved into the details of his deal and what it means to him to be a part of the Gunners' set-up:
It's exciting times for me. It's great to be a part of this club and it's a team that I've always watched in the Premier League. I've envisaged myself playing in this team before. For it to finally happen is very exciting.
I believe the style of play the manager's got and the boys play and with the magnificent players in midfield slotting balls through, I can run on to the end of those balls and slot them away.
Welbeck progressed through the Manchester United academy and has been hailed as one of their finest products in recent years, but had struggled to compete with the raft of striking talent at Old Trafford.
Red Devils fans may be left stung to hear of Welbeck's previous Arsenal intentions, with the England international going on to add:
I've been at United ever since I was a little boy and I had a great time there. I just think this is the next stage of my development - to come to Arsenal, to really show people what I can do as a footballer and hopefully get to the place where I want to be.
Things move on in life and I think you've really got to make the right decision in the situation that you're in at that moment in time. I really do believe that coming to Arsenal is the right decision.
In the same late period that Welbeck completed his move to north London, United sealed a season-long loan for Monaco superstar Radamel Falcao, further evidence of Louis van Gaal's hopes to get his side firing again.
Welbeck, on the other hand, will have a clear path for the foreseeable future, it seems, brought in primarily to ease the pain of Olivier Giroud's broken leg, which will keep him sidelined until the new year.
Yaya Sanogo and Joel Campbell are the only other recognised strikers in Arsene Wenger's first team, and The Times' James Masters notes that England boss Roy Hodgson is among those pleased with the move:
The Telegraph's Jeremy Wilson isn't the first to liken Welbeck's transfer to that of Daniel Sturridge's move to Liverpool in 2013, pointing out the remarkable scoring improvement he made as a result:
Van Gaal wasn't under the same obligation to give Welbeck prominence that Sir Alex Ferguson, David Moyes and Ryan Giggs perhaps were, having not been around the Premier League for much of his development.
The Dutchman was always adamant to cast a fresh pair of eyes on the Red Devils' squad, and with sentiment notwithstanding, the striker was deemed surplus to requirements.
In a way, though, it's a deal that leaves all parties satisfied. Welbeck receives the first-team chances he's yearning for, Arsenal get their reinforcement in attack and United receive a decent fee for a player who was otherwise only a fringe option.
Of course, Welbeck may wish things turned out differently with his boyhood outfit, but he now looks forward to a new page being written in his Premier League tale.