Bruce Banner / Hulk (odds of dying: 15 to 1)
Never mind expiring contracts. Mark Ruffalo and Kevin Feige have been speaking publicly about a 3-part arc for the Hulk in Thor: Ragnarok, Avengers: Infinity War, and Avengers 4. The completion of that arc may be the end of Bruce Banner. Banner once tried to take his own life, but the Hulk wouldn’t let him. The Hulk may not be able to stop Thanos from finishing the job, however, and eliminating the “Strongest Avenger” would be a crippling blow.
Compounding all of that is the fact that Hulk can’t even have his own movies thanks to Universal holding the distribution rights. He can’t pal around with Thor forever. One potential saving grace might be the possibility of splitting (or completely uniting) Banner and Hulk to give the character(s) a brand new direction.
Vision (odds of dying: 10 to 1)
The death of Vision appears imminent in the Infinity War trailers. Corvus Glaive, one of the Children of Thanos, is attempting to pry the Mind Stone, which helped give Vision life, from the synthezoid’s forehead. This attempt will not be successful, but we know another will be made in Wakanda.
Can Vision survive without the Mind Stone? He could, as Ultron also came from the Mind Stone and did not physically need it on him in order to live, but we may be asking the wrong question. In Captain America: Civil War, Vision expressed his desire to understand the Mind Stone. His improved understanding could be the key to Thanos’ ultimate defeat.
What if Vision’s body “dies” when the Mind Stone is removed, but he still lives on inside of the stone? Perhaps with a little help from Wanda, Vision could be the fault in the Infinity Gauntlet that helps The Avengers break it apart and beat the Mad Titan once and for all. Vision was the central figure in Thor’s own “vision” of the Infinity Stones in Avengers: Age of Ultron, suggesting the synthezoid will play an important role in Infinity War and Avengers 4 to the every end.
Of course, saving The Avengers won’t necessarily guarantee Vision’s survival if the Mind Stone is destroyed in the process and Vision is still inside of it.
Hawkeye (odds of dying: 8 to 1)
He may have survived Avengers: Age of Ultron, but everyone’s favorite pick for “Most Disposable Avenger” can’t live forever. Unless Feige wants to pull from Matt Fraction’s Hawkeye comic book run for one of those 20 completely different movies after Avengers 4, Clint Barton (Jeremy Renner) holds little value for a solo franchise. As a founding Avenger, however, his death would serve the next two Avengers movies with the kind of dire consequence that the MCU hasn’t always offered.