"Avengers 4" spoilers reveal the possible demise of a fan-favorite Marvel superhero. Iron Man comic book artist and writer, Bob Layton told Tampa Bay Times (via Screen Rant) that Tony Stark will likely die during the film. There is also a new theory from "Ant-Man and The Wasp" that will connect to the events of the story.

The fourth film will feature the surviving Marvel heroes in their last stand against Thanos, as they try to save the whole universe from annihilation after they failed to stop him during "Avengers: Infinity War."

Iron Man's death in 'Avengers 4' imminent

"That is one way of doing it, but I’d only be guessing.

I know this — I wouldn’t want to recast Tony Stark. Who would want to try to top Downey?" Layton told Tampa Bay Times. "But, if Tony doesn’t come back, they can put somebody else in the armor and start a new generation of Iron Man."

Interestingly, the first details about Tony Stark's death were found in the leaked "Spider-Man: Far From Home" plot, wherein Peter Parker is devastated about the demise of Stark and tries to live up to his example. Robert Downey Jr. made a great portrayal of Tony Stark in the Marvel Cinematic Universe, from the Iron Man trilogy to the Avengers films. He has committed to the actors and staff of Marvel Studios and never fails to give the comic book fans and moviegoers what they want.

Time travel twist in the sequel

According to Forbes, the post-end credits of "Ant-Man and The Wasp" may have supported a long-running fan theory for "Avengers 4." It started when Scott Lang helps the Pym family gather energy from the Quantum Realm to help Ghost's phasing condition.

Scott suits up in his Ant-Man suit and prepares to enter the portable Quantum Gate, but Janet Van Dyne warns him not to get caught in a time vortex.

The Pym family were turned into ash when Thanos used the power of the Infinity Stones leaving Ant-Man to be stuck in the Quantum Realm.

The mention of the time vortex in the Quantum Realm may indicate that Tony Stark figured out a way to prevent the "Thanos Snap" from ever happening via time travel. Numerous leaked behind-the-scenes photos saw Iron Man, Ant-Man, and Hulk travel to New York during the Chitauri Invasion in the newest Avengers film and meeting a younger Captain America. This is also a way to save the fallen characters such as Spider-Man, Doctor Strange, Black Panther, The Guardians of the Galaxy, and more from the Soul World.