Pin the post in the community and lock the community.
This will cause a big chunk of people subscribed to this community to not even notice that the community has been locked and that there is an active different community.
As you all wish
Should ping people or not?
Not sure. People seem to be against it. Maybe ping people on !moviesandtv@lemm.ee for a start?
I recommend that you change the display name to "[Dormant] Shows and TV", to make it obvious in search results.
Done, thanks!