Imagine two celebrities are dating and the news is known by many people.
Can I describe it
The news is well-establisbed.?[Image]

Question

Imagine two celebrities are dating and the news is known by many people.
Can I describe it 
The news is well-establisbed.?[Image]

Answer

The news is well-known. (Established means that it has been around a long time, and wouldn’t work in this context).

Answer

The FACT may be well-established. I wouldn't say the NEWS is established. The NEWS would be well-known.

Answer

Yes, if you want you can also cut out the news altogether and assert that the fact is well established.

It is well established that X is dating Y.