Attack
Henrikh Mkhitaryan (Right Winger)

The Armenian linked up incredibly well with Aubameyang during their time together in Germany at Borussia Dortmund and Wenger will be hoping they can replicate that form in England. In the 2015-2016 season, the pair scored an amazing 62 goals between them.
Mkhitaryan never got the run in the Manchester United team his talents deserved, too often finding himself jostling for an attacking position with Anthony Martial, Juan Mata, Marcus Rashford, and Jesse Lingard.
If he is given freedom to show his talent in London, though, the deal that brought the player to the club will start looking like a tremendous business by Wenger. Mkhitaryan possesses incredible ball control and dribbling skills, so his ability to carry the ball from the wide right and take defenders out of the game will be vital.
This formation allows for Ozil to drift out to the right-hand side, giving Mkhitaryan the chance to come inside and link up with Aubameyang in the centre. It's fluid, flexible, and should suit the players needs to help them show their best form.
Pierre-Emerick Aubameyang (Striker)

The new main man, there's no doubt that Wenger will start Aubameyang when he's fit. He's the kind of player the Frenchman adores so much. He is incredibly fast, full of acceleration, with the finishing ability to match.
The player is at the right age to show his best ability in English football. He's definitely operating at his peak, scoring 13 goals in just 16 league appearances for Borussia Dortmund before his departure.
Aubameyang is also a charismatic figure, confident and bold, represents the kind of player Arsenal fans could grow to idolize, in the vein of their former hero Thierry Henry. He will look to stretch EPL defences with his speed, similar to the job Jamie Vardy does for Leicester, and Ozil will be looking to slip through balls to him at every possible opportunity. If they start to click, Arsenal should begin climbing the league table very soon.
Alexandre Lacazette (Left Winger)

One had to feel slightly sorry for Lacazette, for he was acclaimed just as much as Aubameyang upon his own arrival at the club last summer: he came for similar money, had scored a great number of goals at his former club Lyon, was at a good age and full of confidence that he could lead the line.
It hasn't fully worked out for the player but it hasn't been an unmitigated disaster either, which should be a source of frustration for the Frenchman. Lacazette has actually performed admirably well since the start of the season, without truly hitting world-class form, but that has more to do with the team's struggles collectively; it's always hard to find the goals as a forward in a team not expressing themselves as well as they could.
He has a commendable 9 goals in 24 league appearances and is clearly too good a player to relegate to the substitutes bench, so Wenger should be looking to fit both he and Aubameyang into his starting XI.
It will be unfortunate but Lacazette will most likely find himself moved over to the left-hand side of the pitch, to accommodate the new arrival, but he definitely has all the attributes needed to cope well in this role. He has speed, trickery, and good dribbling ability that could help him easily find a lot of goals from this position just like Alexis Sanchez did before him.
When Thierry Henry arrived at the club from Juventus, he was famously converted from a left winger into a striker, and it would be interesting if Wenger could reverse this move and find similar success with Lacazette.
Having Lacazette occupying defenders from that side of the pitch should give Aubameyang some free space to exploit through the middle. The fluidity of the system also allows for the two to partner each other up front with Mkhitaryan dropping a little deeper in behind them.