Christopher Markus & Stephen McFeely will follow Captain America as they head to Marvel’s “Avengers: Infinity War – Part 1” and “Avengers: Infinity War – Part 2”!

The duo behind the screenplays for Marvel’s “Captain America: The First Avenger,” “Captain America: The Winter Soldier,” and “Captain America: Civil War” will once again team with directors Joe and Anthony Russo for the two-part climax to Phase 3 of the Marvel Cinematic Universe. “Avengers: Infinity War – Part 1” will hit theaters May 4, 2018, with the second part following on May 3, 2019.

“Chris and Steve have been an integral part of the Marvel family since the early days of Phase 1, and their work speaks for itself,” said Producer Kevin Feige. “We couldn’t be more excited to have them with us to help guide the Avengers through their biggest story yet.”

In addition to writing all three films in Marvel’s Captain America franchise, Markus & McFeely also created “Marvel’s Agent Carter,” which premiered earlier this year on ABC, and co-wrote Marvel’s “Thor: The Dark World.” Beyond their work for Marvel, Markus and McFeely also wrote “Pain & Gain,” “You Kill Me,” and “The Life and Death of Peter Sellers.”

Markus & McFeely are represented by UTA and attorney David Colden.

The film is the first in a two-part sequel in which Thanos plays a major role, along with the Magus. Adam Warlock’s bad side, the Magus, separates from his body and assembles the Infinity Gauntlet. Magus creates doppelgangers of Earth’s heroes as part of his plan to recreate a universe of evil.

Integrating THE DEFENDERS Into AVENGERS: INFINITY WAR Would Be "Complicated"

Ever since Marvel expanded into television and Netflix, fans have been clamoring to see some of these new small-screen heroes, specifically The Defenders, show up in Marvel Studios' two-part magnum opus, Avengers: Infinity War.

So, what's the verdict? Is there a possibility we get to see some of Marvel's popular and well-received Netflix Defenders show up to assist The Avengers in Infinity War?

Well, "it's complicated."

Speaking with SUPER Interessante at CCXP, co-director Anthony Russo fielded a question regarding whether any of The Defenders could realistically appear in Avengers: Infinity War. Instead of going into the likelihood of it actually happening, Russo chooses to touch on how difficult it would be to actually make it happen. "The films are controlled by a group led by Kevin Feige, so they function as a unit. Other products, even if they are from Marvel, are controlled by others." Breaking down what this means, outside of seemingly affirming rumors of a small divide between Marvel Studios & Marvel Television, is that even though all of Marvel's content takes place in the same universe, the creative decisions behind the films, the TV shows, and the Netflix series are made independently of one another.

So, essentially, it's up to Feige and the film division to decide on whether or not they want to feature a small-screen character in one of their big-budget films and then it's up to the television division to decide on whether they want to adjust their production schedule and allow that to happen. We may have seen film characters cross over into television before, but crossing television characters into films is considerably more complicated.

Read Anthony Russo's full answer below:

Never say never, but based on Russo's comments, it really doesn't sound like integrating Marvel's small-screen heroes into Avengers: Infinity War is particularly high on Kevin Feige's to-do list. Does this mean it won't happen? Absolutely not. They did after all manage to bring Spider-Man into the mix, which at this time last year, seemed like an impossible mission that only Ethan Hunt could conquer. However, when you consider that Spider-Man is and always will be an extremely popular film character with a rich and well-known history, it's easier to throw him into the mix story-wise versus adding a variety of pieces from television that by 2018 will all have their own on-going story arcs and extensive history that the general audience may or (more likely than not) may not be aware of.

Also, judging by Russo's comment, it could be inferred that The Defenders (and to a much lesser extent, the Agents Of S.H.I.E.L.D.) would only be added to Infinity War and/or to any Phase 3 film if they somehow benefitted the story, which currently seems like a long shot at best. When you look at Infinity War and the vast amount of heroes that film will already be juggling, it's hard to imagine how any of Marvel's television characters could impact the story in a meaningful way and not just be glorified cameos.