When Marvel announced their upcoming movie slate back in October - with all the pomp, circumstance and RDJ-related awesomeness you'd expect - a whole lot of the focus fell on the imminent(ish) Captain America: Civil War, and the fantastic news that some of Marvel's most beloved characters will be getting their own solo movies in the years following it.
So, amid all the clamor surrounding Black Panther, Doctor Strange, Captain Marvel, and even Inhumans, something has been a little bit forgotten.
That something? Avengers: Infinity War.
After all, the first part of the third Avengers movie (which will actually arguably be the fourth and fifth Avengers movies, seeing as it's split into two parts) isn't set to arrive until 2018, with the second coming the following year.
That, though, doesn't mean we shouldn't already be getting over-excited about it - or taking a look at just how big a deal it could be.
So, I thought I'd take a look at some of the key things to watch out for...
(Warning, massive potential Infinity War SPOILERS below - for the comics, at least...)
It's Not Just the Infinity War
Specifically, there's a good chance we'll see elements from both Marvel's Infinity War crossover, and the Infinity Gauntlet crossover that arrived a year earlier. After all, it's the Gauntlet storyline that saw the initial rise of Thanos, and the combination of the six Infinity Gems into the Infinity Gauntlet itself.
Things are Going to Get Dark
Specifically, half the universe is going to die. Which, in the comics, coincidentally wipes out most of the X-Men and the Fantastic Four (sorry Fox!) - as well as literally half of the life in existence. The reason? Thanos is in love with the physical embodiment of Death, and wants to impress her by killing a whole lot of people.
It's Going to be the Biggest Crossover Yet
As in, you thought The Avengers had a lot of heroes in it? Expect Infinity War to bring together pretty much every hero from the MCU in an epic extravaganza of Thanos-opposing. After all, Josh Brolin himself recently revealed that "it’s Thanos against everyone." And when Marvel says everyone, they almost certainly mean everyone. Congratulations new Netflix heroes - you just hit the jackpot.
With One Big New Hero
That hero? Adam Warlock. Y'know, the guy who's already totally in the MCU, hidden away in a cocoon in The Collector's museum back in Guardians of the Galaxy.
In the comics, Adam Warlock was initially created by a group of scientists trying to engineer the perfect artificial human. He then, though, went on to become a cosmically powered superhero, and to lead the fight against Thanos.
...But That's Just the First Half of the Story
After all, that's just the Infinity Gauntlet. After Thanos is finally defeated - by Nebula, no less, played in Guardians of the Galaxy by Karen Gillan (above) - he ends up living on a farm, being generally kind of depressed.
And then, Adam Warlock takes control of the Infinity Gauntlet - and, for some reason, decides to expel the good and evil sides of himself, in order to become a completely logical being. The only problem? The evil half becomes the villain The Magus. Who promptly creates a brand new inter-dimensional realm, as well as evil duplicate versions of several Marvel heroes.
And you know what that means?
We're Going to See Evil Captain America
Or, at least, a whole bunch of evil-doing mirror-'heroes' - those doppelgängers created by the Magus. So, expect a fair amount of Infinity War (Part 2, is my bet) to be filled with our heroes having to fight mysteriously evil versions of their friends and allies.
It'll also mean, though, that...
Doctor Strange is Going to Be Really Important
After all, as Kevin Feige revealed earlier in the year, when it comes to Doctor Strange, Marvel is very much thinking inter-dimensionally:
"[T]raveling through dimensions and traveling through other realms is something that we think is very, very cool"
So, if Doctor Strange is the only one who can travel between dimensions, he's going to be a pretty fundamentally important part of Marvel's Infinity War - and the Avengers in general.
But, most important of all...
It'll Be Very Different from the Comics
Of course, there are also several ways in which Marvel's Avengers: Infinity War will, inevitably, diverge substantially from the comics. After all, the MCU has evolved to be a very different thing to the comic-book Marvel universe - with very different leading characters and, crucially, without access to several of the comics' leading heroes.
So, while the comic-book Infinity Gauntlet and Infinity War crossovers can suggest a whole lot about what to expect, and some details - Thanos' central role, the arrival of Adam Warlock, Doctor Strange being key to the whole thing - seem likely to remain, a whole lot more is about to change completely.
After all, one of the greatest things about the MCU is that it can keep even the most ardent comic-book fan guessing...