If so... meh?
Even if they did decide to risk it, there's not really enough time to playtest a revised Artificer class for April (barely enough for subclasses). It'd be races at best.
Plus, do you remember seeing a Ravnica playtest? Why would we get an Eberron one?
But it's not the future. It's cross-brand marketing. Ravnica is established MtG IP. It's 15 years old. The "future" would be a completely new campaign setting. I'm sure that would also upset a segment of D&D hobbyists, but it at least wouldn't be a ham-handed marketing push coming from Hasbro. Get ready for a Player's Guide to Cybertron, or, Rita's Dumpster Delve.
So... I got my hopes up and was disappointed. And so I should get my hopes up again?
Won't I likely just be disappointed again?
Again, there's pretty much no way they'll do two campaign settings back-to-back.
Even if they did decide to risk it, there's not really enough time to playtest a revised Artificer class for April (barely enough for subclasses). It'd be races at best.
Plus, do you remember seeing a Ravnica playtest? Why would we get an Eberron one?
They've been pretty clear that they're not doing the same books they did previously. So no Manual of the Planes.
And the "Guide to the Multiverse" was half expected by the content we ended up getting in Tome of Foes. The idea of a "big book of setting crunch" is pretty much wishful thinking. Like the requests for more boxed sets.
They're not. Because they'll announce the spring 2019 book in January or February of that year.
Anything they announce tomorrow will be the stuff they tease that's coming out this summer. Which, since we don't have Amazon listings or ISBNs, will be digital offerings.
Again, I expect PDFs akin to the MtG Planeshift books, only for the other settings.
Possibly with an updated draft of the artificer. Which won't appear in Ravnica, as there's not enough time to playtest it before it goes to print.
My impression of Dragon Heist is that it's at least 50% Waterdeep sourcebook and no more than 50% adventure. Now, if you're not interested in FR, it's probably not the book for you, but saying it's "$10 per level" is implying that it's all adventure and has no value for money at all.
So as someone who has zero background in M:tG, but is really excited about this - are there any good sources to get some background on Ravnica (other than just digging through pages of Google results)?
I see there is a novel trilogy and novella trilogy - those any good? I have no idea how much lore and setting information there is for part of a card game, but I'm excited to find out.
(Oh, and I don't mean that in a disparaging way. Like I said, I have no experience with M:tG, so I really have no idea how much setting information they put into things. Thanks!)
Where has that been said? It's not in the product info.
To get some background on Ravnica, I would suggest looking at the story page of the plane on the MtG website: https://magic.wizards.com/en/story/planes/ravnica. This should give a good overview of the setting's guilds and races.