Lafanga i disagree with you although i appreciate your optimism.
Arsenal dominance gradually started to decrease and tumble downwards after they lost to Man Utd at Old Trafford back in October 2004 in that trilling match.With goals from Van Nistelrooy and Rooney sinking the 'Invincibles' into their first Premier League defeat in more than a year.
I still remember John Champion saying after the match "they are invincibles no more"!