I think the price of tickets will have some say, not a huge amount though unless were talking a big time price decrease. Most of these fans the main expense is traveling to NYC and staying there, not the game tickets. So you are going to need these schools to have enough fans to shell out the dough to get and stay in NYC for a weekend. Pitt, Uconn and Cuse were the biggest draws not just because of the caliber of ball being played but all because of the close proximity of the schools and the fan bases willing to travel the short distance.
I think attendance wise they are going to really need Marquette to stay a top 20 program, because when they are good they show up. Gtown is good, not great at filling up the garden. St. John's is what it is, not very good.
PC, Hall, and Depaul's presence is laughable.
The A10 is a similar league to the new BE and they get an average of 6k fans a game and that is with 3 Philly schools just down the road.
Can Xavier and Butler travel? I do not know, but MSG better hope so.