• Avengers: Infinity War is a two-part superhero film directed by Anthony and Joe Russo as part of phase 3 in the Marvel Cinematic Universe.

Avengers: Infinity War is a two-part superhero film directed by Anthony and Joe Russo as part of phase 3 in the Marvel Cinematic Universe. (Photo : Facebook/Marvel)

New details and possible spoilers for "Avengers: Infinity War" will feature a leaked concept art of Mistress Death and Bucky Barnes becoming Captain America soon.

"Captain America: Civil War" star Sebastian Stan made headlines on Instagram when he posted a photo of him holding a custom "Winter Soldier" shield with the caption that says "Excuse me...where's the restroom?" A big thank you and shout out to Casey McBroom@shield_labs for making this for me. Will come in handy... #wintersoldier #marvel".

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Despite the humerous caption on display, comic fans could not help but wonder if Stan's character Bucky Barnes/Winter Soldier could be Steve Roger's (Chris Evans) successor to the mantle of Captain America. Bucky will be joining Steve in "Avengers: Infinity War" along with his teammates and other Marvel characters such as the Guardians of the Galaxy, Doctor Stephen Strange (Benedict Cumberbatch) and possibly Carol Danvers/Captain Marvel (Bree Larson).

Stan could likely take up the mantle of Captain America after Evans completes his contract with Marvel Studios. Perhaps, Steve Roger's death is being teased in "Infinity War" soon?

Bucky became Captain America after the events of "Civil War" after Steve "died" and left Tony Stark with a specific task to make his former partner his successor. Steve's death was also hinted as huge rumor during "Captain America: Civil War" but never came to be. It is likely that Cap could pass his mantle to Bucky anytime soon in the MCU whether it will be in"Avengers: Infinity War", the next Avengers film or in Phase 4 of the MCU, MovieWeb reported.

In other news, a rumored concept art of Mistress Death has leaked online as the Facebook page of the Marvel Cinematic Universe posted possible photo of death in "Avengers: Infinity War", Nerdreactor reported.

Previous reports hinted that Hela. Goddess of Hel (Cate Blanchett) will double as Death herself in "Avengers: Infinity War" helping the Mad Titan Thanos (Josh Brolin) in his schemes.

Thanos will complete all six Infinity Stones; Space, Reality, Power, Mind,Time and Soul Stones. The last Infinity Stone is theorized to be the eyes of the Asgardian Gatekeeper Heimdall (Idris Elba) and will be reveal itself during "Thor: Ragnarok".

"Avengers: Infinity War" is slated to be release on May 4, 2018, while the fourth film is scheduled on May 3, 2019.