Minneapolis’s Walker Art Center is about to unveil its huge expansion, turning the city’s modern art showcase into an even more prominent local landmark than it already was. But a few blocks away, the more tradition-bound Minneapolis Institute of Arts is preparing to open 27 new galleries, and it, too, will be putting the focus on recent art. “Officials at both the Walker and the MIA dismiss the notion of a rivalry, even though they clearly are fishing for donors in the same relatively small pool of big-time Twin Cities area art collectors.”