^^This. In the 5e world, Ravenloft is in the Demiplane of Dread, which is a sub-plane of the Shadowfell. It states in several 5e sourcebooks that nothing should be taken literally and you shouldn't feel like you have to be pigeon-holed into what sourcebooks say - make it your world. Change it up. Add your own stuff. Anything is possible.
After the second sundering in the Forgotten Realms, many things changed and the Gods were not exactly sure how the cosmology was affected. Going along the same lines as Ravenloft - you could say that after the sundering new planes were created or discovered. Since Ravenloft is a demi-plane of the shadowfell, maybe Ravinica is a demi-plane of the Feywild? Or maybe a new plane of its own?
Also - not sure if you know, but there is actually a Ravinica sourcebook for D&D also - https://www.amazon.com/Dungeons-Dragons-Guildmasters-Guide-Ravnica/dp/0786966599
They just released a full campaign guide for Ravnica. And not some free small electronic pdf but a full hardcover D&D release for running games in Ravnica. New classes races items and lore. It was really well received.
It would be easier to do it with D&D 5e since there is an official Ravnica campaign guide out.
I think they already fused those cosmologies when they released the MTG DnD supplements. https://www.amazon.com/Dungeons-Dragons-Guildmasters-Guide-Ravnica/dp/0786966599
Don't forget the official "Guilds of Ravnica" D&D content
Ravnica D&D Manual
> Completely mucking up MTG's lore (and D&D's, I assume)...
You mean like this?
Meanwhile, how would it "muck up" MtG's lore?
Having a plane that happened to also have iconic D&D stuff wouldn't effect the main MtG storyline any more than both games having dragons, goblins, elves, and so on. I don't think anyone's making the case that we start adaping Raveloft and Dragonlance to MtG sets...but there's be absolutely nothing wrong with a plane that happened to be populated by Beholders, Gelatinous Cubes, Mindflayers and so on.
D&D would be perfect to adapt, as it's not like it's disparate worlds are necessarily interconnected anyways, which is why you can have something like a Ravnica D&D set in the first place.
Seriously...if you're going to bring up an objection, immediately, to the "god I hope not" level, I'd really like to know what you're so afraid of.
I think, given the fact that the OP is translated into Portuges, there is a non-zero chance the intern doing the localization for this might have mistaken Wizards IP.
Ravnica and Eberron have a lot of similarities, a little Dark Sun too, we can hope for the best.
If not... honestly Ravnica is an awesome setting. A lot of people saying it's not as fleshed out as our now classic D&D settings is patently unfair. There are dozen book fantasy/sci-fi series' that aren't as fleshed out as D&D settings. They haven't had 2+ incarnations over 3 to 6 decades, with a body of work combining dozens, maybe hundreds, of authors and creators.
If you're a MtG fan, Ravnica is perfectly well fleshed out. It would definitely be a game of catch up, but it wouldn't be bad.
Edit: Never mind, looks legit
It’s on the English site as well.
D&D Guildmasters' Guide to Ravnica HC https://toptalkedbooks.com/amzn/0786966599
Here's the book on Amazon: https://toptalkedbooks.com/amzn/0786966599
And the map pack: https://toptalkedbooks.com/amzn/0786966610
And the dice: https://toptalkedbooks.com/amzn/0786966602