The Gunners will leave Highbury at the end of this season and start the next Premier League campaign in the nearby 60,000-capacity Emirates Stadium.
Arsenal's managing director Keith Edelman says that the North London giants will surpass Old Trafford, even though Manchester United have 68,000 seats.
"We will earn significantly more in revenue. Our gate income will probably be the highest in the world," said managing director Keith Edelman.
This stems from the London club charging a higher price for tickets and having more premium seats.
