IGN recently did one of their unfiltered interviews with Bethesda director Todd Howard. The review is mostly about the 10 year anniversary of Skyrim however future games got mentioned as well and even Fallout got touched upon. It's a nice interview in the regard that they focus on strengths not flaws, praise not criticisms. They talk about how in the past Bethesda has alternate between an Elder Scrolls game, then a Fallout game and the Elder Scrolls again and so on. Ryan McCaffrey asks what will happen to the next Fallout now that Bethesda are committed to first Starfield which is due out in November 2022 and then for their next project they have already committed to Elder Scrolls VI which will be some years after that. The gap between Fallout 4 and the next will be huge if you don't count Fallout 76. McCaffery asks if Fallout will go to the back of the line or if another studio, within the "Microsoft family", like InXile or Obsidian could handle the next Fallout, to which Todd replies that Fallout is very much in Bethesdas DNA now and that even though they have worked with other studios in the past he can't say what will happen in that regard. Then Todd says that they already have a one-pager on Fallout 5 that details what they want to do. He then continues and says that even though he would like to accelerate their game development process he can't say what will happen after Elder Scrolls VI. They still work on one project at a time and their focus is still on single player RPG:s.