Les O’Dell The Southern A Carbondale start-up business that wants make Southern Illinois into a production hub for online content, film, television, podcasts and other media is the winner of the 2021 Regions Bank Business Plan Competition. Brand Advocacy Group, a tenant in Southern Illinois University Carbondale’s business incubator, was announced as the winner of the $5,000 first prize during an innovation and entrepreneurship showcase event Thursday at SIU. The business’ founder, Nathan Colombo, of Carbondale, said the honor gives credibility to the company. “There have been a lot of people who question my motives in this work because they do not understand it,” Colombo said. “I think this is…