Aubameyang tapped home the opener at the Emirates before Ainsley Maitland-Niles made it two before half-time.
Aubameyang then wheeled away before reaching over the advertising hoardings and pulling out a Black Panther mask, as he had promised.
It didn't go down well with the officials as Aubameyang was shown a yellow card for his troubles.
FIFA rules state when a player should be cautioned for "unsporting behaviour".
"If a player covers his face with a mask or other similar when celebrating a goal: this is an unnecessary and excessive display of celebration."