Bethesda is aware of the strong anticipation on Fallout 4 and they are also well-informed on how excited the fans are upon hearing that the game developer has book a full conference slot at E3 this year.
It seems that all evidence are pointing out that Bethesda is in contention to announce Fallout 4 at their E3 presentation. Of course, there is still a chance for everyone to be wrong and Fallout 4 to not get announced.
To make things worse, Bethesda might toy with the fans hearts through announcing a different title by teasing on Fallout 4. A fan known as OzkrTheGrouch from his YouTube account shared a video on his nightmarish visualization of this outcome in a video above and it does look possible to happen.
From one angle, the half-a-minute clip above might look funny. On another angle, it provokes the entire Fallout community and can easily start an angry mob. If you have yet to check out the video, we highly encourage you to do so now.
With that being said, fans better start praying hard that E3 will finally break the ice on Fallout 4. Bethesda too should be aware on this and reconsider their plans if they are thinking of unveiling something like the above.