No. I don't think they'll consider it.
Because that's several GIANT "ifs". IF the show is a hit. IF it attracts an audience larger than any of the other half-dozen D&D shows on the channel. IF there is fan demand for the product. IF Mearls find the time in his busy schedule to turn it into a full sellable PDF.
And IF they decide to do that version rather than the original.
But also keep in mind:
We haven’t seen any of Perkins’ homebrew setting. Perkins and Mearls also both did a Greyhawk campaign, and those documents didn't get released.
We didn’t get a Ravenloft campaign setting book despite Perkins'
Dice, Camera, Action being set Barovia for a long time.
We haven't seen a Planescape book despite TWO streaming campaigns in that world.
We still haven’t seen a Realms Guide.
Also.. doing a big "Traveller's Guide to the Nentir Vale" is unnecessary for two big reasons.
1) That literally already exists in the 4e DMG. You can use that without issue. Unlike Eberron, there are no races and classes to update.
2) The whole point of that setting is that it's a simple skeleton DMs can use to make their own. An expanded guide is self defeating.
But even if they do... how does it affect you in the slightest? Your old books aren't going to explode. That content is still all there if you want it.
And if they do, they'll probably tag all the other adventures and locations set there in PDF products, allowing curious newcomers to pick up those books more easily and see the classic Vale. It will be easier to find that content, and more people will be interested in reading it.
Just like all my Ravenloft books are still available on my shelf and didn't vanish when Wizards of the Coast butchered that setting for
Curse of Strahd.
And it's not like there was a huge swell of interest by everyone for that setting following the adventure's launch. Similarly, while the
Wayfarer's Guide to Eberron sold well, not many other Eberron books have sold on the Guild. People just don't use pre-published campaign settings all that often.
Of course he’s allowed to run his game any way he wants. And I’m allowed to not like it.
Yeah... so don't watch it and ignore it. Like a bad movie adaptation of a beloved book. Or a terrible cover of a favourite song.
You're allowed not to like it. But don't crap on the idea for people who do and move on with your life.
Which would be a bad thing to do because...?
Because you don’t have to like it as you’re not involved and it doesn’t affect you or your game in any way. You can literally ignore it and it functionally goes away.
Find something else to think about. Do something that makes you happy. Don't watch the stream and the problem is solved.
I fail to see how this is relevant. We’re not talking about events that take place in the streamed campaign here. We’re talking about significant retcons to the setting’s lore being straightforwardly presented as a Nentir Vale campaign. That would be like Chris Perkins saying that all the Gods in the Forgotten Realms used to be Yugoloths or something on stream. I think a lot of Realms fans would be justifiably critical of such a thing.
We ARE talking about events in a stream campaign. Or rather, the world background for a streamed campaign. They're not retconning anything: they're changing things for HIS version of the world. Mearls is pretty repeatedly clear that he's making changes and that this is his conception of the world.
I doubt Realms fans would be upset at Perkins for a story point like that. Because him saying something on a stream doesn't make it canon.