Bethesda found themselves under fire once again when they announced the Survival mode for Fallout 76, and interestingly enough, the player concerns directly resulted in a community manager spilling the beans on the planned PvE content.
Fallout 76's upcoming Survival mode is pretty much the same mode as what everyone was playing so far, except the PvP restrictions will be lifted. This means players can freely shoot each other up and those of lower level will be scaled so they stand a chance in a firefight against veterans. What they can't scale, though, is gear.
Players who collected high-end items such as power armour or Gauss rifles will obviously have an edge here and to make matters worse, Bethesda decided to let players use their existing characters and freely switch between Adventure and Survival modes with them. This prompted players to voice their concerns and ask Bethesda not to allow this as it would ruin a blank state experience in Survival many would like to try out.
Valseek, Bethesda's community manager on Reddit, stated that the company is still looking into the options and will take community feedback into consideration. While this bit of information was well received, other fans started asking Valseek whether Bethesda had any plans for future PvE content.
Apparently, they do, and it is slated for release at some point in March 2019. Technically, Valseek didn't explicitly say it's PvE content but it is a direct answer to the questions about PvE. There is also no official confirmation whether this PvE content would arrive in the same update as Survival beta or in a separate one.
Another odd bit of information is that Bethesda didn't announce any PvE content for early 2019 back when they spoke about their plans for the year. It remains to be seen whether it's just a small, shoehorned bit of PvE content to appease the fans or if it's a proper content update that Bethesda kept as a surprise.