This post is pretty self-indulgent, but it’s also 36 hours past when I usually post the Friday article, so I think it’s pretty clear at this stage that it’s either a self-indulgent post most people will skip or a non-existent post that all people have no choice but to skip.
My recent musings on setting syncretism came from a hobby project to combine as many D&D settings as possible into a single solar system, that you can travel between using some kind of Spelljammer-esque space magic. I’m dealing with copyrights held by like eighteen different companies here, so I could never actually release a finished product, but it’s a fun exercise anyway. Some things fit in, others not so much. I’m going to go through the construction of this setting before delivering the final result, so you can sort of look at this as an example of how to syncretize different settings. I’m doing this on a lark and not because I think it’s actually a good idea, which means I’m not applying the usual standards of “this setting is too lame, we’ll have to exclude it completely” that you’d want to get a really good syncretist super setting, but other than that, I stand by these methods.
First of all, let’s look at what we’ve got to deal with: The 5e DMG lists seven official D&D settings, those being Forgotten Realms, Dragonlance, Greyhawk, Eberron, Mystara, Dark Sun, and Birthright. Not listed but officially supported is Ravenloft, the setting for the Curse of Strahd AP. Supported by previous editions but now not so much as mentioned are Ghostwalk and Council of Wyrms. Also the super-settings Planescape and Spelljammer, but those are obviously mutually exclusive to this single solar system idea, although we will be borrowing elements from them.
Right here we run into an immediate problem: Over half of these settings are very similar. Greyhawk and Mystara have a ton of overlap, Forgotten Realms, Dragonlance, and Birthright are politically and tonally distinct but culturally and climatologically similar, and even Eberron is more different in the civilization that occupies its landmass than in what that landmass actually is. They’re all temperate mostly-European settings with usually some jungles and deserts tossed in at the edges. Only Dark Sun and Council of Wyrms have an environment that immediately makes you think “yeah, this is a different planet,” although Ghostwalk and Ravenloft have enough weird weather stuff going on that they kind of work as different planets if you squint (and Ghostwalk isn’t anybody’s favorite setting, so if we make it super cold, no one will complain).
Luckily, we’ve got plenty of settings left to build our solar system from, so we can always use these climatologically similar settings as different continents on the same world or, especially for the smaller ones, moons orbiting other worlds. That still means we need to plumb other settings for what our major planets are going to be, however.