I'm confident that Toriyama's involvement in all things DB today is extremely minimal, and they just tout his name as a marketing tool. I don't have much evidence, but it's a hunch.
In nearly all properties he's had his hands on in the last 10 years, from art for other games, anime, etc. he's been as hands off as he could get away with. (Before the pedants jump on me, obviously there are exceptions)
The only thing that I've seen Toriyama not shy away from are designing characters.
Every interview I've read by him, he's unashamed to admit that he only made small contributions and that others did the heavy lifting. From suggestions by others, to fleshing out scripts, assisting with character art, being involved with the anime etc.
It could be a Japanese manners thing where you try to be humble and minimize your contribution as a way of being polite, but he doesn't strike me as that type of person.
My whole point is that I believe that Toriyama does very little with DB nowadays, much less than they tell us he does.
I think the reason they say he does this and that, is because there are shitload of fans who will start to criticise Super even more if their supreme lord Toriyama wasn't involved. I believe he is on a Walt Disney level of talent and influence, but I also believe there are competent people who can take over the product and do good with it.
For anyone who thinks that no Toriyama would automatically make the anime/manga a dud due to past works like GT, look out to other mediums like comics and see how some properties can be done right with different authors.
They're clearly setting it up this way for the future with all the acclaimed script writers for the anime. Toyotarou as Toriyama's apprentice, DBH's wild success, and Dragon Garow Lee doing the Yamcha manga.
I have many thoughts on this, but this is turning into a thesis paper so I'll leave it here so that we can discuss.
