Bleach has had a pretty long run as far as Shonen anime go — the manga series started in 2001, whereas the anime adaptation began three years later in 2004. Its popularity made it one of the Shonen Big Three, a position it held together with One Piece and Naruto. The Bleach manga, written by Tite Kubo, completed its serialization in 2016, but the anime was canceled after the Fullbringer arc in 2012. Fans were naturally devastated, and many of them hoped that Bleach would eventually animate the Thousand-Year Blood War arc.
Source：https://www.cbr.com/bleach-thousand-year-blood-war-explained/
