I hadn't heard anything about this until I saw your post. I did some quick research today and discovered...
"China to Reform Top Chinese Proficiency Test HSK," 27 May 2020
"China's HSK Language Test to be Overhauled for the First Time in 11 Years," 25 May 2020
The second article says to keep checking the official HSK site for details: http://www.chinesetest.cn/index.do.
What I understood from the articles: Yes, they're planning to divide the levels into 1-9, but no details are currently available.
I've been studying for HSK5, so this affects me, too. Thanks for bringing it to my attention!