"South Park: Bigger, Longer & Uncut" was originally titled "South Park: The Movie" during its development. The film, released in 1999, is an animated musical comedy based on the popular television series "South Park." It tackles themes of censorship and political correctness through the story of the boys of South Park who sneak into an R-rated movie, leading to a series of escalating conflicts with parents and the government. The final title reflects its humorous and irreverent style.

As of October 2023, there has been no official announcement regarding a new "South Park" movie set for release in 2025. However, creators Trey Parker and Matt Stone have expressed interest in continuing the franchise, and there are ongoing developments related to the series and potential future projects. For the latest updates, it’s best to keep an eye on official announcements from the creators or the show's network.

"South Park: Bigger, Longer & Uncut" was rated R primarily for its explicit language, sexual content, and dark humor. The film features numerous instances of profanity, adult themes, and satirical commentary on sensitive topics, including censorship and war. The creators, Trey Parker and Matt Stone, intentionally pushed boundaries to critique societal norms and the entertainment industry. The film's content reflects the show's irreverent style and is aimed at an adult audience, which contributed to its R rating.

As of my last knowledge update in October 2023, "South Park: Bigger, Longer & Uncut" is not available on Paramount Plus. The film is part of the South Park franchise, which is produced by Comedy Central, a subsidiary of Paramount. However, it may be available on other streaming platforms or for rental/purchase. Always check the latest listings on streaming services for the most current availability.