1. Adult Swim is developing an anime spinoff of the popular animated series "Rick and Morty." The spinoff will feature a new storyline and characters, but will still be set within the "Rick and Morty" universe. The announcement of the spinoff was made during a panel at Anime Expo 2023, where a short teaser trailer was also shown.

2. The anime spinoff will be produced by animation studio SOLA Entertainment, which has previously worked on other anime projects. The series will be directed by Takashi Sano, who has directed episodes of the main "Rick and Morty" series. The spinoff will aim to capture the same irreverent and surreal tone of the original show, while also exploring new narrative possibilities.

3. The plot details of the anime spinoff are still under wraps, but the teaser trailer hinted at a story involving a new character named Dōjin. The trailer showcased the distinctive art style and animation that fans can expect from the spinoff. The announcement of the anime spinoff is part of Adult Swim's continued expansion of the "Rick and Morty" franchise, which has proven to be a popular and successful property for the network.