She-Hulk is a Marvel character introduced in February 1980. She’s also the star of an upcoming Disney+ series.
In Marvel lore, She-Hulk is lawyer Jennifer Walters, the shy cousin of Bruce Banner (the original Hulk). After an accident, Walters receives a blood transfusion from Banner, which gives her his powers, albeit in a milder form. Marvel’s official character description notes that “while she gained massive strength, she never lost her passion for justice.”
In addition to incredible strength, She-Hulk has superhuman agility, and she’s capable of retaining her intelligence and much of her personality while in Hulk form. She prefers to remain in her Hulk body, where she’s more self-confident and assertive.
In 2007, She-Hulk comic writer Peter David compared the character to D.C. Comics' Wonder Woman.
"She-Hulk has the potential to be our Wonder Woman," he said. "A powerful female with a strong moral center and a determination to do what's right. She's also a unique combination of brains and brawn. The ideal She-Hulk story is one that plays on both aspects of her make-up, the intelligence combined with her strength."
She-Hulk comics are typically fairly humorous compared to the rest of the Marvel catalog. Time will tell whether the Disney+ series takes the same approach.
"Bruce Banner is no longer the only Hulk in the [Marvel Cinematic Universe]," Marvel head Kevin Feige said when announcing the new series. "Jennifer Walters is a Hulk, she’s a lawyer, and she’s going to star in a show unlike anything we’ve done before."
The series was announced along with two other live-action series, Ms. Marvel and Moon Knight, as part of Marvel’s Phase 4 content schedule. As of September 2019, it’s in the early stages of pre-production, so it hasn’t started filming yet.
Disney has not set a release date for the series, but it probably won’t hit the Disney+ streaming service any earlier than late 2020.