It’s similar to GT. Goku and Supreme Kai (of all people) are turned into children and have to go on some kind of adventure across space.

It is an Akira Toriyama original story, but it doesn’t seem like something strictly canon.

They did bring back an original character designer from DBZ though, and supposedly it has solid animation talent behind it. It’s been a poorly kept secret for the past year and isn’t starting until next year, so they put lots of production time into it.

I suspect it will be decent, but I’m one of the weirdos who likes GT, so we’ll see.