Mark Zeigler: Pac-12 would bring value, validation for San Diego State — but what if the conference fractures?

SAN DIEGO — We’ve seen this movie before.

Spoiler alert: It doesn’t end well.

In December 2011, San Diego State held a triumphant news conference in an athletic department auditorium to announce it was joining the Big East as a football-only member starting in the 2013-14 season, calling it “a very historic day in our history.”