I knew that Super Saiyan 3 Vegeta was Canon, and I’m really glad they were able to introduce it in a way where it wasn’t outshined by all the other God forms in Dragon Ball Super.
And fun fact, you’re the first one to tell me about Super Saiyan 4 being canon! I just checked out the scene where Goku transforms in Diama, and it makes me feel like a missing hole in my heart has finally been filled.
Super Saiyan 4 was more than deserved to be canon, and now it is recognized in a DB series that has a lot of potential. I’m really glad that Toriyama (who I believe helped work on Diama) decided to add this in here. And to be real, it feels like a last parting gift from him. So I think all of the DB community is very pleased.
But yeah, bottom line is that I absolutely love the two being canon now, and I’m excited to see where they lead with this forms next.
(Maybe super Saiyan 5? Okay maybe I’m pushing it )