I'm curious as to why you think this. Not saying you're wrong, but I just didn't put the two together.
I would have thought if anything would trigger other Big 10 schools to add hockey, it would have been PSU's move and the establishment of the BTHC. Obviously we're still early, but so far I don't think we've seen much movement in that regard. So I'm curious why teams starting up at ASU, and maybe other western schools might cause something that establishment of the BTHC has not.
It's just my opinion, but I don't think any of these moves are school-driven. Programs will be added only if the right ingredients come together. You probably have to have a moderately successful club program. You need someone (read: wealthy alum(s)) willing to pony up substantial money for start up and initial funding requirements (including for a women's team). You need a decent arena to play in, or a ton more money from the wealthy donors. Finally, someone has to get off their butts and actually start the process.
I think that has to happen at each school that wants to start a program, whether it's a western school where no others are playing, or a Big 10 school that already has the league structure in place.
And, the financial requirements are only going to get larger as schools move into the athlete compensation packages.