If there was going to be any news about Overwatch, I’d assume he would have explicitly mentioned Overwatch.
AndyB’s most recent posts indicated that the developers are “aware”-
-of the community’s frustration with a lack of communication on their end so I can’t imagine Mike saying nothing about OW and leaving upcoming news as a “surprise”.
TL, DR:
If there was anything to announce about OW- I personally believe he would have/would say something about it ahead of time.