Board Thread:Questions and Answers/@comment-31829073-20171020180822/@comment-33728484-20171020183345

They're only on the Japanese version of the game as of now, since it started six months earlier than Global, but here are some of them: Hybrid Saiyans, Revived Warrior, Shadow Dragon Saga, Fusion. More categories will be added in the future as the game progresses. Each Wikia page lists the characters with category-related leader skills at the top, so you can click on them to see what they do.

SSJ4 Gogeta and PHY Omega Shenron have already been released on Global (without leader skills, yet), so you'll have to click on "Japan", in the top left part of their page, to see what their leader skills are.