The latest updates and spoilers for "Avengers 4" revealed that a deceased member will likely make his return to the movie. A new rumor is making rounds that "Kick-Ass" star Aaron Taylor-Johnson was spotted on the set, which led to comic books fans believing that he will reprise his role as Pietro Maximoff a.k.a. Quicksilver.

Marvel Studios producer, Nate Ross, teased new Marvel characters that will be included in Phase 4 of the Marvel Cinematic Universe after the fourth film.

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The plot of the sequel will feature the remaining heroes' last battle [VIDEO] against the Mad Titan, Thanos, after he successfully collected the Infinity Stones and wiped out haft of the universe.

Quicksilver comes back from the dead?

According to Heroic Hollywood, Aaron Taylor-Johnson was seen on the set of the "Avengers 4" production. Johnson played the speedster Avenger member Quicksilver, in "Age of Ultron" and he was killed by Ultron during the final battle in Sokovia. While it is unknown what kind of role will Quicksilver have in the film, this could prove the time-travel theory that has been the source of numerous speculations about the plot of the sequel.

There have several behind-the-scenes photos that featured Iron Man, Hulk, and Ant-Man talking to Captain America during the battle of New York in the first "Avengers" movie. All of the characters are wearing a device on their hands hinting to be time machines.

The sequel will also feature the appearance of other MCU characters that were absent in "Infinity War" such as Hawkeye, Ant-Man, Wasp, and Captain Marvel.

For now, Scott Lang and Hope Van Dyne will return in "Ant-Man and The Wasp" movie as they travel to the Quantum Realm to save Hope's mother, Janet.

Carol Danvers will make her MCU debut in her solo film as she battles the Kree and the Skrulls in the 90's era. She will be joined by the younger versions of S.H.I.E.L.D. agents Nick Fury and Phil Coulson [VIDEO].

New heroes for Phase 4

Nate Moore told Screenrant that Phase 4 in the MCU will have characters that are prominent in the next film projects while hinting that some mainstay characters will be cut-off from the film universe.

"I think it's an opportunity for us to bid farewell to characters that we've come to know for a while, but also then introduce new characters who are going to feel completely new and hopefully surprising to our core fans and fans of our Movies who arent's as well-versed in publishing," Moore said.

These characters include Adam Warlock, Nova Richard Rider, Moon Knight, The Eternals, and Ms. Marvel Kamala Khan.