When fast-fashion retailer H&M opened its first Colorado location on Denver’s 16th Street Mall in 2011, more than 900 people lined up for its grand opening. Target is set to open its long-in-the-works store on the mall at 8 a.m. Sunday. The first 1,000 shoppers get a free reusable bag. It remains to be seen if that event will generate the same kind of fervor H&M did.