"Hulk" (2003), directed by Ang Lee, and "The Incredible Hulk" (2008), directed by Louis Leterrier, are related in that both films feature the Marvel Comics character Bruce Banner, who transforms into the Hulk. However, they are not direct sequels. The 2003 film is a standalone adaptation, while the 2008 film serves as a reboot within the Marvel Cinematic Universe (MCU). Edward Norton plays Bruce Banner in the 2008 film, replacing Eric Bana from the 2003 version. The two films have different tones and storytelling styles.

As of my last update in October 2023, there has been no official announcement regarding who will play the Hulk in a movie set for 2025. However, Mark Ruffalo has portrayed the character in the Marvel Cinematic Universe since "The Avengers" (2012) and is widely associated with the role. Future casting decisions may be revealed in upcoming Marvel announcements or projects. Please check the latest sources for the most current information.

Mark Ruffalo has portrayed the Hulk since 2012's "The Avengers," but there hasn't been a standalone Hulk movie featuring him primarily due to rights issues. The character's film rights are owned by Universal Pictures, which complicates the production of a new solo film. Additionally, Marvel Studios has chosen to focus on ensemble films and the character's appearances in the Marvel Cinematic Universe (MCU) rather than a standalone project. As a result, Ruffalo's Hulk has primarily appeared in team-based narratives.

As of October 2023, there are no official announcements regarding a new standalone Hulk film. The character has appeared in various Marvel Cinematic Universe (MCU) projects, such as "Avengers" films and the Disney+ series "She-Hulk: Attorney at Law." While there have been discussions about potential future projects involving the Hulk, particularly with the character of Bruce Banner, no specific release dates or titles have been confirmed for a new Hulk movie. Keep an eye on Marvel announcements for updates.