I don't know the exact issue there, BUT high voltage electrical issues can take HOURS to work...it's not an easy/quick repair...there are a LOT of safety issues/work clearances that need to take place even before the work gets started.
However, I'll say this...there should be a way to isolate the incoming feed and run the stadium on emergency stand-by power. That should only take a short period of time and would only effect the stadium during the actual outage and the transfer back over to commercial power (should be done after the game). Anyway...that's my two cents.