Much news or many news

In this case, the correct answer is "much news".

The reason is that "news" is a plural noun, but it's being used as a mass noun, meaning it's referring to a quantity of news that can't be counted individually. In this case, "much" is the correct determiner to use, as it's used to describe a quantity of a mass noun.

For example:

On the other hand, if you were referring to individual pieces of news, you would use "many news":

So, to summarize: