Count 1 of Advantage Marketing Group’s lawsuit against James P. Keane Sr. contends he usurped a corporate opportunity — by allegedly arranging to buy a competing business called “The Mail House” for himself when he was one of AMG’s principal employees — but a Cook County judge tossed the claim because Keane wasn’t an officer of the corporation.Keane also insisted that, “even if the corporate opportunity doctrine applied, he disclosed the corporate opportunity to AMG …