That’s the official tagline from Xbox announcing the release date for the Blackout beta for Call of Duty: Black Ops 4 for Xbox One. It will launch on September the 14 along with the PC beta.
You can join in the fun if you preorder Black Ops 4 from the Xbox Store or from a Retailer. If you managed to get a code during the multiplayer beta you will have access to the Blackout beta as well. Remember do not delete the multiplayer beta from your console as that will also be the Blackout beta files.
— Xbox (@Xbox) 20 August 2018