In order for that world record to fall, several things have to happen.
First, it has to be in a facility large enough to break the record.
In the USA, these schools have larger stadiums than Nebraska: Michigan, Penn State, Ohio State, Texas A&M, LSU, Tennessee, Texas, Alabama, Georgia, USC, UCLA, Notre Dame, Florida, Auburn, Oklahoma.
The Cotton Bowl in Dallas is also larger than Memorial Stadium, and there are several NFL stadiums with capacity similar to Memorial Stadium: MetLife (NJ), Lambeau (WI), AT&T (TX).
If one expands the search globally, there are several soccer or cricket stadiums larger than Memorial Stadium, in India, North Korea, Australia, Spain, South Africa, China, England, Qatar, Mexico, Malaysia, and Egypt, and a few more that are similar in capacity. (I left out the horse or auto racing facilities, though they top the list of largest venues.)
So there are certainly other facilities that could be used in an attempt to break the record.
Second, there has to be a women’s sport with enough fan support to break the record. That’s probably the stumbling block, though there are several of the schools listed above that have strong women’s volleyball or basketball programs, though perhaps not the incredible fan support that Nebraska volleyball has.
My guess is that an attempt might be more likely to succeed in basketball or soccer than in volleyball, possibly in one of the international venues.
The third factor is a group willing to make the effort. That’s similar to the fan support issue above, but I could see local or national pride becoming the basis for the effort. (North Korea, for example.)
And they could probably have accommodated another 1000 or so people in Memorial Stadium last night on the field, though I’m not sure how much they could see of the game. But the infield at the Indy 500 is usually packed and they can’t see a thing from there!