Halo Wars 2 leak reveals open beta coming at E3

E3 2016 officially kicks off tomorrow, and Microsoft's big press conference is scheduled for Monday, June 13th. While we now know that a PC port of Halo 5 won't be among their announcements, it seems an open beta for the upcoming Halo Wars 2 will be. A listing for the game turned up on the Xbox Store (surely by mistake) …