Arsene Wenger has revealed a few secrets about Arsenal's transfer plans.
"We will know more about that tomorrow morning," said Wenger.
Aubameyang was pictured at Dortmund airport on Tuesday heading for London. The 28-year-old will wait at Arsenal's London Colney training facility while Dortmund work on finding a replacement for him.
His move could hinge on Olivier Giroud's departure. The 31-year-old was on the bench for the Swansea defeat.
When asked if it was a possibility Giroud had played his last game for Arsenal, Wenger replied: "It's a possibility."