I doubt if it will be Vegas.
NBAA was there last year and severe restictions were placed on non airline traffic as a result of the threat of litigation by a number of airlines. This dates back to the previous NBAA in Vegas (1998?) where massive delays built up on certain days and there was massive disruption of airline schedules.
Moreover the static display was relocated to Henderson about 10 miles south of the field which was fine, except the airfield could not take an A319 or BBJ much to the annoyance of Airbus and Boeing.