Being from Batavia, we have heard this rumor for years. Usually entails a smaller multi-purpose domed stadium topping out at 65k seats. Would it be nice, you bet. Would it be the biggest thing since the Batavia Downs, you bet. Would I be able to afford to attend more games, NO!
Potential problems would be the small local airport may not handle the planes nfl teams use and roads going into and out of Batavia are mostly single lane. Route 5 is the exception. Even access to the thruway exit is tight with 1 road in and out. I remember before OTB when the race track was going strong, cars would be backed up, jammed up for a couple of hours after the track let out on Friday and Saturday nights. I forget how many people the track used to hold, but it wasn't 65K.