&nbsp;The rationale for $260 million for a new sports arena is that it will revitalize downtown Detroit. &nbsp;But will it? &nbsp;What have we learned from other arenas in the area? &nbsp;Do more businesses pop up and are there more jobs created? &nbsp; Let's look at the facts: &nbsp;<a href="http://www.michigancapitolconfidential.com/19935">www.michigancapitolconfidential.com/19935</a>