From the article:
Akira Toriyama originally intended to conclude Dragon Ball with the Cell saga, but strong editorial pressure forced him to extend the series, according to a recent interview with three former Dragon Ball editors: Kazuhiko Torishima, Yu Kondo, and Fuyuto Takeda.
This was revealed during a recent episode of KosoKoso podcast on Feb 22, 2025.
“Supposed to” is a little misleading. It would be just as true to say that Dragon Ball was “supposed to” end after the first 3 chapters.
Toriyama never expected nor intended the series to run as long as it did. The only time the series was definitively “supposed to” end was after the Boo arc, as it did.
Toriyama definitely wanted to be done, especially during the Cell arc, but it was decided (in his discussions with his editors) that the Boo arc would be the last one.
This is a lot to say that “wanted to” would be much more appropriate than “supposed to,” which is what the original Tweet says, but clickbait news site has to make it sound more interesting (not op’s fault).
Source:
https://www.kanzenshuu.com/intended-end/
Update regarding this interview specifically:
https://bsky.app/profile/kanzenshuu.com/post/3lizpnc7pjk2g