I think the retcons in Super from Z are due to the time Episode of Bardock changing the timeline and creating a new continuity
I think the retcons in Super from Z are due to the time Episode of Bardock changing the timeline and creating a new continuity.
In Z we have Gokus backstory being sent to Earth as a newborn with the mission to kill off all the humans. Goku was a violent baby that became calm being hit from the head.
In Minus and the Broly movie we see Goku being sent by Bardock and Gine in the stolen pod as a toddler without a mission because they are concerned about Frieza. Goku was a peaceful toddler that inherited Gines gentle nature.
At first I thought it was all retcons, but I think Bardock s presense in the past is what explains why what we seen in super is Canon yet seems off from what we saw in Z. I think it's not a retcon but a change in continuity.
1Original dragonball and z manga
2 then episode of Bardock then an altered version of the Dragon ball and z events as seen from the Broly movie, and then Dragon ball super.