It wasn’t just Deadpool‘s subversive story and R-rated action that had everybody talking about its 2016 release. While superhero movies feature a post-credits scene meant to tease at the next movie in the universe, Deadpool, in keeping with its genre-busting appeal, took something of a different approach.

After Deadpool‘s credits roll, we see the merc with a mouth dressed up like Matthew Broderick in Ferris Bueller’s Day Off, telling the audience to go home. After a brief cut, he reappears to drop the first breadcrumb for the already green-lit Deadpool 2.

Oh! I can tell you one thing, and it’s a bit of a secret. The sequel? We’re gonna have Cable. Amazing character, bionic arm, time travel. We have no idea who we’re going to cast yet, but it could be anyone. Just need a big guy with a flat top. Mel Gibson, Dolph Lundgren, Kiera Knightly? She’s got range, who knows? Big secret, shhhh. Oh, and don’t leave your garbage all lying around. It’s a total dick move.

Fans of the comics probably know exactly why this is important. Cable is an integral part of the Deadpool source material, and his addition to the franchise was really only a matter of time. For those not in the know, though, let’s explain a little bit.

1. Who is Cable?

Cable is a hero whose origin story is about as comic-book-y as you can get in terms of complexity. Marvel’s online hero encyclopedia provides a lengthy rundown, involving cloning, demons, human sacrifices, techno-organic viruses, and time travel. But because you probably don’t want to read a 5,000-page thesis paper, we’ll give you the short version instead.

Known also by his alter ego, Nathan Summers, Cable was created originally as an alternative leader to Professor Xavier, with powers rooted in telekinesis, bionic body-parts, and latent time travel abilities. He’s the son of Cyclops and Madelyne Pryor (a clone of Jean Gray) and is often portrayed as a gun-slinging soldier-type.

In terms of who would play Cable, the most prominent rumors point toward Kyle Chandler (Bloodline, Friday Night Lights) as the leading candidate. But after director Tim Miller left the project due to creative differences with Ryan Reynolds, the search began anew. As of now, there’s no official news as to who might play Deadpool’s partner in crime.

2. Cable & Deadpool

So why are fans going ballistic about Cable appearing in Deadpool 2? The answer to that question can be found in the pages of Cable & Deadpool, the 50-issue team-up series published by Marvel between 2004 and 2008. The comics pair the two characters together for a series of insane adventures, blending the time travel abilities of Cable with the meta-humor of the merc with a mouth.

The stories themselves are about as crazy as it gets: The first issue features a nefarious plot to turn everyone in the world blue, where Cable literally ends up absorbing and subsequently throwing up Deadpool. Basically just another regular Deadpool adventure.

3. Deadpool 2

As it is with any popular superhero franchise, it won’t be long before we get a series of sequels. Deadpool 2 was green-lit before the first movie ever hit theaters. Most actors will sign a multi-picture deal for large-scale franchises, and we imagine Ryan Reynolds did something similar for this one.

Writers Rhett Reese and Paul Wernick are reportedly already working on the script (featuring the yet-to-be-cast Cable) and John Wick co-director David Leitch, was tagged to replace Tim Miller as director. As for the rest of the cast, Collider reports that upwards of 10 actresses are testing for the role of Domino, including Ruby Rose, Lizzy Caplan, and Mary Elizabeth Winstead.

4. Why Tim Miller left the project

When Deadpool 2 was officially announced by Fox at CinemaCon, Tim Miller sat down with Collider to talk about the upcoming sequel. In the interview, he confirmed his intention to make it R-rated (duh), while talking about how another movie in the series doesn’t necessarily mean a bigger scope plot-wise. As Miller pointed out, “What you don’t want to do is all the stupid stuff like ‘Oh, now it has to be twice as big because people are going to be bored!’ or ‘It’s going to have three times the villains!’”

That came to a head following his departure, with most sources claiming Miller wanted to triple the budget of the first Deadpool film, clashing with Ryan Reynolds’ own vision for a smaller, more focused aesthetic. According the Wrap, the issues between the two men ran much deeper than that, citing how they “haven’t had much of a relationship since the first Deadpool was released, not even speaking for long periods of time.”

5. Ryan Reynolds unveils the first teaser before Logan

We’re still a ways off from the release of the Deadpool sequel, but we already have a sense for what it’s going to be like. That information comes to us courtesy of the first official teaser, showing Wade Wilson attempting to change into his superhero outfit inside a phone booth, all while a man is mugged at gunpoint.

It’s just about everything you’d expect based on the off-kilter humor of the Merc with a Mouth, and is a hilarious first look at what’s to come for the movie franchise.

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