Speaking to Official Xbox Magazine (via Games Radar), Bethesda VP Pete Hines discussed the studio's approach to remastering games.
"Generally speaking, our approach has usually been that instead of spending all this time on a thing we've already made, why don't we instead spend that effort on something new, or on the next version of that thing?" Hines explained.
In effect, HD upgrades like Skyrim: Special Edition and Dishonored Definitive Edition were exceptions to the rule at Bethesda. Bethesda had incorporated lots of bells and whistles into 2015's Fallout 4—which used an updated version of Skyrim's engine—that the studio wanted to roll into Skyrim, such as support for mods.
Dishonored Definitive Edition was a special case. "We did one for Dishonored but that was a unique case where it was a new IP at the very end of the last generation of consoles. So remastering it and bringing it to this gen wasn't a ton of work and it made a lot of sense given the proximity of those two."
Given the way Bethesda has staggered Fallout and Elder Scrolls releases, one could presume that an Elder Scrolls 6 is next up on the developer's docket. While it's in development, players shouldn't expect any news on that front for a while.
"I think that's kind of the elephant in the room, always, when we talk about anything," director Todd Howard said at E3 2016 in regard to an Elder Scrolls 6. "I think it's good in these moments to tell our fans, 'Yes, of course we are.' It's something we love. But I have to be careful what I say. It's a very long ways off. I can sit here and explain the game to you and you'd say, 'That sounds like you don't even have the technology, how long is that going to take?'"