Yes, there is a movie titled "Teen Titans Go! To the Movies," released in 2018. It is an animated film based on the television series "Teen Titans Go!" The story follows the Teen Titans as they seek recognition and respect in the superhero world, leading them to embark on a quest to make their own movie. The film features humor, action, and a variety of beloved characters from the DC Comics universe. It was well-received for its comedic take on superhero tropes and its engaging storyline for both kids and adults.

Stan Lee made a cameo in "Teen Titans Go! To the Movies" as a nod to his iconic status in the comic book and film industry. His appearance reflects the film's playful tone and its celebration of superhero culture. The film features various humorous and meta references to superhero tropes, and including Stan Lee, known for his contributions to Marvel Comics, adds to the lighthearted commentary on the superhero genre. This cameo serves as a tribute to Lee's legacy and influence on comic book adaptations.

As of October 2023, there hasn't been any official announcement regarding a sequel to "Teen Titans Go! To the Movies." The film, released in 2018, received positive feedback from fans, leading to speculation about a follow-up. However, no concrete plans have been confirmed by Warner Bros. or the creators. Keep an eye on official announcements for any updates on potential future projects related to the "Teen Titans Go!" franchise.

Yes, Shia LaBeouf made a cameo appearance in "Teen Titans Go! To the Movies." He voices himself in a humorous scene where he interacts with the Teen Titans. The film, which is based on the animated series "Teen Titans Go!," features various celebrity cameos, and LaBeouf's appearance adds to the fun and comedic tone of the movie.