The Incredible Hulk
The second movie in the MCU is often forgotten despite being a mostly serviceable origin story for the big green guy. The Incredible Hulk stars Edward Norton, who would be replaced as Bruce Banner by Mark Ruffalo in future appearances, and as such, a lot of people who come in late to the Marvel universe tend to skip it. You’re not missing much if you already know the Hulk’s whole deal, though some references to its characters in Captain America: Brave New World might go over your head. But this was before the MCU became the juggernaut it did, and it’s mostly a bog-standard superhero origin story that Marvel wouldn’t revisit for 17 years. — Kenneth Shepard