It appears that the civil war that threatens the Avengers will have a far-reaching effect on the group. 

Cinema Blend has unleashed a major spoiler for "Avengers: Infinity War." According to the report, the 2018 and 2019 films could feature a drastically different team than the ones moviegoers are accustomed to. The same team seen right up to "Avengers: Age of Ultron" might be two heroes short by the time "Infinity War" happens. 

[SPOILER ALERT] The two heroes in question —Thor and Captain America — will star in each of their own potentially-storyline-altering movies. Captain America will be in "Captain America: Civil War," and the superhero might not make it through to the end of the movie. Thor, for his part, will be appearing in "Thor: Ragnarok." The title alone suggests why Thor might be missing in action, as Ragnarok in Norse mythology points to the doom of the gods.  

Fans of comic book Avengers won't be surprised if the Marvel Cinematic Universe will be changing line-ups. But Movie Pilot suggests a different type of change for the MCU. 

The report guesses that a villain might make a return to the MCU — namely Ultron, who was last seen being disintegrated by Vision in "Avengers: Age of Ultron." It might be that Ultron manages to live on, albeit in energy form, on the Mind Gem found on the forehead of the MCU's Jarvis/ Vision hybrid, and might be unleashed once the Mind Gem is taken. 

A theory that the article explores is that the Vision might be Adam Warlock's counterpart in the MCU. The lack of casting calls for Adam Warlock, as well as director James Gunn's admittance that the character's cocoon in the Collector's collection in "Guardians of the Galaxy" is of no significance, seems to back this up. 

The Cinematic Universe is a wholly different dimension from the comics (it is known as Earth-199999). People will find out whether the spoilers above are true or not as Parts 1 and 2 of "Avengers: Infinity War" arrive in 2018 and 2019, respectively.