The pop-up showroom will run June 8-9 but other than that, no further details were given out. I guess we'll just have to wait for more info as the tweet says and see where it leads. You'll probably want to give @BBMobile a follow if you're not already following them.
source： https://crackberry.com/blackberry-mobile-announces-pop-showroom-show-blackberry-key2#bbr6hUc18BocptDZ.99