http://www.ign.com/articles/2018/05/29/bethesda-teasing-fallout-announcement
Bethesda Game Studios has taken to Twitter to tease something Fallout-related - we just don't know quite what that is right now.
The developer's tweet uses one of the "Please Stand By" test cards used across the series (although this appears to be a brand new version of them), as you can see below:
Predictably, speculation is rife - one emerging theory is, with this October being the 10th anniversary of Fallout 3, a remaster or remake is on the way.
...
It's also possible that this is a spin-off in the vein of Fallout Shelter. Bethesda is working on a "bleeding-edge AAA freemium game", a mobile title (which may or may not be the same thing), and at least three other projects.
It's not clear when the studio will follow up on this tease, but you can be all but sure that we'll know more by the end of Bethesda's 2018 E3 conference on Sunday, June 10.