Google will not ban you for selling your news site as it's not stated in their terms etc...
Please do not make such claims or direct people in to nonsense.
Google will Ban your news site if you use duplicate, spam, promotional posts.
I have around 4 Google news sites and 1 has been running for nearly 2 years with over 7 thousand posts and none of theme have ever been banned.
There is 2 types of Google News sites:
1: Google News Publishers ( Team of Authors providing press releases on all types of categories such as: Finance, Sports, Health etc...)
2: Press Release Distribution Networks ( Sites like prfire: all press releases submitted by third party companies/individuals promoting/spamming about their own company and they still show in google news )
Why would Google ban your site if you have changed ownership and the new owners are producing quality press releases. It is most likely Google will never ever know if the site has changed hands.