I think some of you are going a bit overboard, both with assertions that the stadium project is solely in reference to B12 (or any) conference expansion and that CSU has no shot at being included in potential conference expansion.
As some of you may know, the current stadium, Hughes, is both a dump and off-campus. It needs $30+M in maintenance just to get the basics back on track (electrical, plumbing, lighting, etc). These dollars wouldn't have added anything to the stadium, just kept it from crumbling. Donors for such a project would likely be hard to come by and no new revenue streams would be created. As a result, your primary funding source is the general fund (student tuition/state dollars) and you're still left with an off-campus dump. The new stadium is financed through low interest bonds, offers a legitimate opportunity to pay for itself through a combination of donations and new revenue streams, brings the team and fans back home, and expands options for visiting and hanging out on campus. Sure, CSU has zero chance in conference realignment without a new stadium, but nothing really changes here if CSU is left out. CSU needs to be successful in competing within the MWC, in all phases, before worrying too much about what's next. The stadium is a necessary part of that.
I maintain that CSU has a shot at being included in this round of expansion. Probably not a great shot, overall, and arguably nearly zero if B12 only goes to 12, but there are certain criteria that easily get CSU into the top 4 if (IF) those turn out to be important to B12 decision-makers. Remember, this decision is made by university presidents, not coaches, not ADs, not fans. CSU is a peer academic institution to many B12 schools, would be a natural fit as a university, and has no major NCAA infractions. This is the sort of stuff that may be (hopefully is) very important to the presidents of B12 universities (who are typically academic people) and is not easily fixable for anyone lagging in these areas. Yes, CSU's product on the field and fan bases metrics are behind others on the list. I understand this is about money, and maybe those things end up being the most important, but they are also easily the most correctable factors a university could tackle in the future. The geography is a challenge and nothing changes that. I get it - CSU is little brother, is terrible, blah blah, but this process isn't about football recruiting and may well not be about immediate impact on the field/conference. If the B12 places significant value on long-term potential then CSU has a shot if they go to 14.