When my previous station was sold, it didn't affect us "worker bees". It did affect top management. The GM was removed, as was the ND. It was only after the positions were filled with "company" folks, that the rank & file noticed any differences.
I saw all kinds of changes. In the 14 plus years I was there I had 9 ND's, 5 GM's and 3 owners. I managed to survive.
Some changes were for the better, some were...well, you get my drift.
The important thing is to just do your job. Try to do it well. Everyday. Make a good impression on the new bosses, but don't suck up to anyone, and you shouldn't have anything to worry about. Unless you are on air talent.
Don't worry about things you have no control over. Its the fastest way to an ulcer. Just remember, its always a good idea to have a current resume tape. Just in case. Good luck to you.