If so... meh?
While I hope this is true, I think it is wishful thinking. More realistically we get one, maybe two, classic setting PDFs per year.
I think it likely that many of these start as PDFs until there is playtesting and they become final. Then you may have a Print on Demand option for those that got the earlier PDF version and it's updates. When it's final a regular hardback might be available.
I must ask: why do you need a 5e upgrade on classical settings at all other than for unsolved mechanical issues (e.g. Psionics, Thri kreen, half giant etc.) ?
Do you need a new story? Most of the published 5e material is adaptable somehow.
Do you need advice for shoehorning dragonborn into greyhawk? Thou aren't following a worthy cause then![]()
So what is it besides some rules for mechanic oddities like defiling or a psion class that you need?
I mean if you are of the sort that needs everything printed to the letter in an adventure, then you would need the complete thing.
Say, if you would be unable somehow to even convert some of the starter adventures from 1e or 2e, then you really would need the full package for a setting ,including some 1-20 campaign, maybe some adventurers guide or mordenkaninens tome or whatever also. That is not very likely to happen for most of the old stuff and there is tons of convertible adventures around, so what are your expectations?
I pretty much agree although I don't think we can count on any set gap between settings. First of all there is already some Greyhawk setting specific adventures out there. Then with the Plain Shift materials coming out we already have five of those M:TG settings out there in some form and I'm sure they are still putting the fine tunings on Ravnica and there are other M:TG settings being worked on.
Eberron is in a playtest form that they seem to really be pushing now. Who knows when the final version of that will be done. It could be ready before or after Ravnica or even the same time. Spelljammer is technically a way to travel between the Prime Material Planes different settings even though it's something of it's own setting as well. Planescape involves traveling between the various planes, but you could conceivably travel to different settings in the Prime Material Plane as well. Looks as if you can do this at the Yawning Portal or some other gateways/portals doors in the Undermountain or if you could get to Sigil.
They have spoken about Eberron as if the Crystal bubble surrounding Eberronspace has locked people in that setting in and other setting out, but that this is changing as shards fall to ground and cracks appear. That to me is quite interesting, so I see aspects of Spelljammer and Planescape being worked on and appearing.
I would say that setting such as Dragonlance and Dark Sun are likely to come along following Ravnica and Eberron and then Spelljammer and Planescape. Mystara and Greyhawk go way back and will no doubt along at some point. I think they plan on Dominaria coming up before too long and other M:TG settings as we go down through the list of those. Just as we go down the list of D&D settings.
Some settings that have come out before may have rights issues attached to them so I wonder if there will be some 3rd party support product settings come out at some point. I hope for some collaboration deals to be worked out with some of these as unity seems to be helping D&D a lot these days and division seems to hurt.
Some settings such as Al Qadim, Maztica, Kara Tur, Malatra and The Horde are just different areas that we know are just on the same planet as Faerun and Chult and just involve normal travel. Similarly Savage Coast and Hollow Earth are part of Mystara.
I don't know much about Nentir Vale a default 4th edition setting that I don't think got that much play. It seems to be some sort of cross between Forgotten Realms and Greyhawk. As for Birthright, I don't know much about that either, but some folk seem to love it.
As we go down the list I'm sure the more obscure settings won't get a lot of love for a while if ever and there are planty of them. I expect we will be on to another edition before WotC exhausts them all. We may see one or two completely new settings in a way similar to how they came upon Forgetten Realms and Eberron. All new settings fill a niche of interest among fans.
Some of the settings that I wondser about rights issues, but have had connections with D&D in the past include Blackmoor, Kalibruhn (Rob Kuntz), Lankhmar, Kalamar, Rokugon (Legend of the Five Rings), Hyborean Age, Melnibone, Tekumel (Empire of the Petal Throne) and so many others. You could just go down a list of mythologies in our own history with setting based in Norse Mythology, Egyptian Mythology, Greek Mythology, Roman Mythology, Celtic Mythology, Japanese, Chinese, American Indian, Arthurian, Central and South American, Judeo-Christian, Hindu, Zoroastrian, Babylonian and Sumerian, African and so forth. There is no lack of settings based on books or movies or comics even. There is the cosmic horror of Lovecraft, Middle Earth of Tolkien, The Land of Stephen Donaldson's Thomas Covenant the Unbeliever, Elfquest of Richard and Wendy Pini, the cartoon Pirates of Dark Water. Those are just a few of what I've taken from. I've used everything from Alien to Zardoz. All that stops WotC is working out deals with whomsover owns the rights.
I honestly thought Dominaria was going to be the next D&D setting hard cover treatment, but then the planeshift article was released.
So I don't know which MtG setting will get the official hardcover treatment instead of a volunteer planeshift article next. Maybe Alara.