I can tell you, as my daughter used to tumble at Flip Over when she was still doing Pop Warner before she started High School Cheer, that we tried starting a new all star team there, half year. But, as you mentioned, there was an issue with one of the past owners of the actual gym, and it was rough going despite a great effort by the girls, so it ended after one season. Comet All Stars was also literally around the corner and that's where many of the incredibly talented girls ended up going (one is now attending the University of Louisville and cheers for GymTyme and is Ah-Mazing! She is the daughter of a former neighbor of mine). Comet is truly the Central Jersey powerhouse and, in my opinion, will continue to keep growing as they have talent on every level.
On another note, is Hamilton Katz still around? They used to be very talented when we lived in NJ and even traveled here to SC for BATB and did very well.