Two easy steps:
1. Reestablish insane asylums.
2. Put everyone involved in the NFL and all of their fans in the asylums.
[Although group homes for the mentally retarded might be a better fit for many of the fans.]
Start a rugby league to avoid the whole unsolvable problem of the NFL.
The NBA plays for the Chinese market and it will survive. I don’t think the CCP invest in the NFL heavily.