Forget all of those pretty pictures. Apparently, UND isn't considering building an outdoor, horseshoe-shaped football stadium after all. When I asked JLG Architects - the firm working on the UND athletics master plan - about a specific feature of such a stadium, I was informed that the plan shown above is "an earlier concept that is no longer a part of the plan." So it sounds more like we're talking about a new retractable roof football stadium in UND's future.
I was personally rather fond of the horseshoe plan. I really like the idea of utilizing the existing facade of Memorial Stadium. I'm not sure if the facade would be retained as a part of the indoor plan.