# ##sen returns to football to challenge champions Bayern Munich . Werder Bremen , Schalke , Wolfsburg likely to challenge Bayern this season . Bayern Munich bounced back in superb style last season after some inspired signings in last summer 's transfer window . Legendary keeper Oliver Kahn back , while Jens Lehmann back with Stuttgart . Moenchengladbach , Cologne back in top flight ; Stuttgart new to Bundesliga .
# ##sen returns to football to challenge champions Bayern Munich . Werder Bremen , Schalke , Wolfsburg likely to challenge Bayern this season . Legendary keeper Oliver Kahn back , while Jens Lehmann back with Stuttgart . Moenchengladbach , Cologne back in top flight ; Stuttgart new to Bundesliga .