10 Best Marvel Characters Who Became Superheroes Years Later

It’s surprising to learn that many superheroes didn’t begin their careers battling villains right away. Often, they spent years in comic books playing supporting roles – as sidekicks, assistants, or even rivals – before becoming heroes themselves. A recent example is Mary Jane Watson, who first appeared in Marvel Comics in the 1960s as Peter Parker’s girlfriend and later his wife. Now, she’s taking on a heroic role of her own, becoming the host of the Venom symbiote and stepping out from Spider-Man’s shadow.

Mary Jane isn’t the only supporting character who’s gone on to become a superhero, and she definitely won’t be the last.

10) Cassie Lang

Cassie Lang first appeared in Marvel comics in 1979 as the daughter of Scott Lang, who was then the second Ant-Man. Her parents were divorced, and she often visited the Avengers Mansion, where she spent time experimenting with Pym Particles hoping to become a hero herself. This experimentation worked, and she eventually became the hero Stature, debuting that persona in 2005, 26 years after her initial appearance. Though she tragically died, Cassie was later brought back to life and adopted the name Stinger in 2015.

9) Patsy Walker

Patsy Walker is a Marvel character with a surprisingly long history, actually appearing in comics before Marvel even existed as a company! She first showed up in Miss America Magazine in 1944, created by Ruth Atkinson and published by Timely Comics (which would become Marvel). Initially, she starred in a teen romance comic – no superheroes involved! Years later, she made her Marvel Comics debut in The Avengers #141 (1975). Soon after, she became the costumed hero Hellcat in The Avengers #144 (1976), taking over the cat-themed costume previously worn by Greer Nelson. Since then, Patsy has fought alongside the Avengers and the Defenders, and has developed magical and psychic powers.

8) Pepper Potts

Pepper Potts first appeared in Tales of Suspense #45 in 1963, created by Stan Lee, Robert Bernstein, and Don Heck. Initially Tony Stark’s secretary at Stark Industries, she gradually took on more responsibility within the company. Over time, she became a romantic interest for Iron Man and eventually married Happy Hogan. It wasn’t until 46 years later, in The Invincible Iron Man Vol. 2 #10 (2009), by Matt Fraction and Salvador Larroca, that Pepper became the hero Rescue, with a full appearance in the following issue. Her armor was specifically designed for rescue and defense, prioritizing safety over offensive combat.

7) Amadeus Cho

Amadeus Cho always had heroic qualities, but when he first appeared in Amazing Fantasy Vol. 2 #15 (2005), he was mainly a brilliant sidekick. He could process information and predict events faster than anyone else, using this ability to assist Hulk and Hercules in their fights. A decade later, in 2015, he gained the Hulk’s powers and became the Totally Awesome Hulk. Although his powers have decreased somewhat since then, he’s still a gamma-powered hero known as Brawn.

6) Carol Danvers

Carol Danvers first appeared in 1968 in Marvel Super-Heroes #13, created by Roy Thomas and Gene Colan. Initially, she was a security officer and Air Force member stationed at a NASA base, playing a supporting role in the stories of the original Captain Mar-Vell. In 1969, after an explosion involving a Kree device called the Psyche-Magnitron, her genetic code was combined with Mar-Vell’s. However, it wasn’t until 1977, eight years later, that she officially became the superhero Ms. Marvel with the release of Ms. Marvel #1.

5) Flash Thompson

Flash Thompson first appeared in the same comic book as Spider-Man – Amazing Fantasy #15 (1962) – created by Stan Lee and Steve Ditko. Initially, he was a bully who tormented Peter Parker, highlighting the importance of Peter’s transformation into a hero. Interestingly, Flash was also Spider-Man’s biggest admirer, unaware of Peter’s secret identity. After graduating high school, Flash joined the military and tragically lost both legs during the Iraq War. As a result, the government offered him a chance to become a super-soldier, leading to his role as Agent Venom, which debuted in The Amazing Spider-Man #654 (2011) – nearly five decades after his first appearance.

4) Jane Foster

Jane Foster first appeared in comics in 1962, created by Stan Lee, Larry Lieber, and Jack Kirby. Initially a nurse, she was romantically linked to Dr. Donald Blake, but she felt a stronger connection to Thor, unaware that he and Dr. Blake were the same person. For over five decades, she remained Thor’s love interest. However, that changed in 2014 when, while battling cancer, she proved herself worthy and lifted the hammer Mjolnir, becoming the new Thor. Unfortunately, becoming Thor interrupted her cancer treatment, causing her condition to worsen. She later relinquished her role as Thor and, starting in 2019, became a Valkyrie.

3) Rick Jones

Rick Jones has a long history with Marvel Comics, first appearing in 1962’s The Incredible Hulk #1, created by Stan Lee and Jack Kirby. He was the teenager Bruce Banner tried to protect during the event that turned him into the Hulk. Over the years, Rick assisted various heroes – he helped form the original Avengers team and also served as a sidekick to Captain America and Captain Mar-Vell. After 46 years as a supporting character, Rick finally gained superpowers himself, becoming the gamma-powered hero A-Bomb in 2008. Though Hulk briefly removed his powers, Rick is now a hero again, hosting the Toxin symbiote and operating as Captain Spider.

2) James Rhodes

James Rhodes started as a supporting character in the Iron Man comics before becoming a hero in his own right. He first appeared in 1979 as Tony Stark’s pilot and friend. Over time, he became Stark’s trusted pilot and advisor. In 1983, when Stark was unable to be Iron Man, Rhodes temporarily took over, wearing the armor himself. He later joined the West Coast Avengers, but left when Stark recovered. In 1992, Rhodes officially became War Machine, a role he’s maintained ever since.

1) Mary Jane Watson

Mary Jane Watson first appeared in The Amazing Spider-Man #25 in 1965, though her face wasn’t fully visible. She made a full debut in issue #42 in 1966, thanks to artist John Romita Sr., and quickly became Spider-Man’s girlfriend, and eventually, his wife in a famous Marvel Comics wedding. Their marriage didn’t last, ending in the “One More Day” storyline, and MJ moved on with her life. More recently, in 2023, she became the hero Jackpot in The Amazing Spider-Man #31, but has since evolved and is now taking on the role of Venom in Marvel Comics.

2026-06-12 01:12