There's Slam Dunk II

Slam Dunk II did not exist. Slam Dunk was a Japanese manga that told the story of high school basketball player Inoue Takahiko and his basketball teammates. Although the story and the characters were praised, there was no official announcement of a sequel. Many readers and fans were hoping to see a sequel to Slam Dunk, but so far, there had been no official release of any news about the sequel.