Super Dragon Ball heroes last episode showed something interesting in Cumber recognizing Goku in Super Saiyan God mode. Being a Saiyan from a past timeline it is being said that he knows of knowledge that the others might not. One such thing is that he knows about not only SSG but also legendary and how the two might be similar. Something we will need explained as inch closer to Dragon Ball Super Broly. What those connections will be is something we will have to be.
Article:https://comicbook.com/anime/2018/09/28/dragon-ball-heroes-cumber-ssg-lssj/
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