The Brotherhood of Steel plays a part in Fallout 76, though the exact size of that part remains to be seen. The organization has, at least, made its way out to West Virginia, and left evidence of its visit behind - though how this fits into the lore remains to be seen.
Bethesda’s been releasing some of those E3 gameplay videos in high quality pieces over the past week, and with the benefit of 4K quality and pause features we’ve gotten to examine that footage in exquisite detail. In the multiplayer gameplay video - which you can see below - some remains from the Brotherhood are visible.
There are plenty of wastelands to live through in the .
If you zoom in real close to the shot starting at 1:45, and squint very hard at the barricades next to the downed vertibird, you’ll see a familiar logo painted there. A winglike pattern, a sword in the middle, and a handful of gears in the background - the emblem of the Brotherhood of Steel.
Now, things start to get a little weird once you tie this into proper Fallout lore. The logo shows the larger gear on the right side of the sword, which indicates that this is specifically the East Coast chapter of the Brotherhood - the one depicted in Fallout 3. This part of the organization gets founded in 2254, over 150 years after Fallout 76 takes place.
The Brotherhood proper was founded in 2077 in the immediate aftermath of the nuclear war which wiped out civilization, but as far as the Fallout story so far has gone, they had been locked up in a California military shelter since then.