Will those bunkers have cable?
The totality of Netflix fits on about 100TB. That should do for as long as needed, and probably had been arranged at suitable cost. (Netflix will actually GIVE any ISP a copy free just to mitigate bandwidth costs.)
Will those bunkers have cable?
Yes
Will the cable be carrying any programs after the SHTF?
Probably not.
No, the Kardashians will be there to perform live, 24/7. Happy survival!