The new stadium should really help with increasing the fan base.
Right now the Cardinals disappear from Phoenix within hours of a home game and stay gone until the Sunday morning of the next home game, which can be as much as 4 weeks later. The banners come down at SDS and it returns to it's status as a college football stadium. The entire area around the stadium is ASU oriented. There is nothing in town to remind residents that the Cards are their local team other than a non-descript brick building at the corner of Hardy and Warner.
Lambeau Field, Buccaneer Stadium, the SuperDome, Reliant,
Arrowhead etc. are all constant reminders of the NFL teams that call them home. Every event scheduled at the stadium markets the franchises. They are, in effect, highly visible marketing wonders.
The new stadium, even with it's controversial location, will do the same thing for the RedBirds.
After all how can you be the Home Town Team when you don't even have a "home".