‘Avengers Doomsday’ arrives this Christmas: All about the debut movies of your favorite superheroes

Marvel’s getting ready for a huge moment: ‘Avengers: Doomsday’. It’s not just another superhero movie; it’s a full-on event, hitting the theaters December 18, 2026. The Russo Brothers are back in the director’s chairs, and they’re treating this one as the big turning point for the Multiverse Saga. This time, the Avengers aren’t just squaring off with any bad guy. This time, Doctor Doom is here, and Robert Downey Jr. is playing him.Talk about flipping the script!The cast of the project is stacked. There’s Chris Hemsworth as Thor, Anthony Mackie as the new Captain America, Sebastian Stan, Letitia Wright, Paul Rudd, Tom Hiddleston, Simu Liu, Florence Pugh, and more. It’s basically Marvel’s greatest hits all in one movie. Doomsday is the next big ensemble after ‘Avengers: Endgame’, picking up the story in Phase Six and setting the stage for ‘Avengers: Secret Wars’.As for the story, it throws together Avengers, Wakandans, the Fantastic Four, and even X-Men. Everyone’s joining forces in this wild multiversal showdown against Doom. It’s a bold move, even for Marvel, but they’re going all in.But before these actors became legends, they started somewhere. Some kicked off in tiny indie movies, others in TV shows you probably missed, and a few in films that barely got noticed. Still, they each found their way into the MCU, and now, they’re sharing the screen in one of the most ambitious crossovers ever.From Robert Downey Jr.’s early roles to Chris Hemsworth’s Australian TV days, every path led to this. Avengers: Doomsday isn’t just another Marvel film; it’s the payoff for years of stories, careers, and a whole lot of hard work.Let’s take a look at their earliest days in front of the camera.Long before he suited up as Iron Man, Robert Downey Jr. took his first steps into acting in a wild little movie called ‘Pound’. His dad, Robert Downey Sr., made this bizarre comedy where people play dogs stuck in a shelter, waiting to get adopted or, well, put down. Picture this: five-year-old Downey Jr. playing a puppy, blurting out, “Have any hair on your balls?” Per IMDb, it wasn’t exactly a blockbuster, but it threw him right into the deep end of show business. Over time, he picked up steam in films like ‘Less Than Zero’, eventually transforming into Tony Stark. Now, he’s even set to take on Doctor Doom.Chris Evans kicked things off in a film called ‘The Newcomers’. It’s your classic “fresh start in a small town” story: a Boston family moves to Vermont, hoping to leave behind the city drama, only to find new problems in their supposedly peaceful neighborhood. Evans plays Judd, a supporting role, but it was enough to get his foot in the door. The movie didn’t make huge waves, but it set him on the path to ‘Captain America’, who totally redefined what a superhero could look like in the MCU.Before Thor’s hammer ever hit the ground, Chris Hemsworth was making a name for himself on the Australian soap ‘Home and Away’. He played a lifeguard with more than his fair share of melodrama: jilted weddings, helicopter crashes, drug overdoses, and a murderer for a dad. These weren’t Hollywood stories, but his charm was already impossible to miss. That same spark launched him straight into the Marvel universe, where he made Thor his own.Tom Hiddleston didn’t start in the spotlight. His first movie, ‘Unrelated’, is a quiet British drama about a woman drifting away from her life during a holiday in Tuscany. Hiddleston plays one of the teenagers she gravitates toward, and even then, you could see flashes of the nuance he’d later bring to Loki. The film is worlds away from Marvel’s spectacle, but it showed he could do subtle just as well as he does grand.Before he bent reality as ‘Doctor Strange’, Benedict Cumberbatch had a small part in ‘To Kill a King’, a historical drama about the fallout after England’s Civil War. He played a Royalist. It was nothing huge, but you got a sense of the sharp, thoughtful energy that would come to define his career. Per IMDb, the film wasn’t a hit, but it was the first step toward the brainy, complex roles he’d become known for.Anthony Mackie’s first big break came in ‘8 Mile’, right alongside Eminem. He played Papa Doc, the leader of Eminem’s rival crew, and the final rap battle between them is still legendary. Per Billboard, Eminem actually used real details from Mackie’s life to get under his skin for the scene. The movie blew up, both critically and commercially, and put Mackie on the map, long before he took flight as Falcon and, eventually, Captain America.Sebastian Stan’s first role was a small one. He played a Romanian refugee kid in ‘71 Fragments of a Chronology of Chance’, a film built around snapshots of everyday life and sudden violence in Vienna. The story is dark, winding its way toward a senseless bank shooting, and Stan is just a kid in the middle of it. He kept grinding away in indie films after that, slowly building up to his breakout as the ‘Winter Soldier’, one of Marvel’s most complicated antiheroes.