An apparent slip of a button press appears to have confirmed that a Halo Wars 2 Open Beta will be starting on the day Microsoft deliver their E3 2016 Media Briefing.
An image of the product listing was captured before it was taken down. The page details how the Halo Wars 2 Open Beta will run from the 13th June through to the 20th June 2016. The Beta client weighs in at 13.01GB and is likely to be kicked off during or just after Microsoft deliver their conference on Monday.
Halo Wars 2 is due to release on PC (Windows 10) and Xbox One later this year.