Wenger may have transformed Arsenal 's fortunes since taking over at Highbury in September 1996 .
Wenger accepts Wenger 's time will soon ' be up ' as the club must one day look for new leadership .
Wenger may have transformed Arsenal 's fortunes since taking over at Highbury in September 1996 , but he accepts his time will soon ' be up ' as the club must one day look for new leadership .