Headcanon: Goku had moved on and likely wasn't even aware of it. When the Z- Fighters showed up they went to King Kai hit Goku was already training with the Grand Kai and couldn't be bothered.
Made Trunks look kind of villainous. Imagine of Trunks was coming from the future to kill Goku for some plot to avoid catastrophe in his timeline. Like Goku had to die to save his future.
Could be first blood syndrome.
With the future androids being somewhat weaker than the present ones, the future Z fighters may have been seen as more of a threat, so the androids committed first blood. After this they were more desensitized to death which led them on a darker path.
https://www.neoseeker.com/forums/88/t2391300-ki-battle-power-different-other-insights-from-koyama/
Koyama's thoughts on the movies.
my thoughts:
M8 Broly < FP Perfect Cell or Super Perfect Cell
M10 Broly ~ Fat Buu
M11 Bio-Broly ~ SSJ3 Goku
His base rose so much that even in a tired state it exceeds his previous max power.
It's certainly a thing in the anime. The manga doesn't show this, but he takes a nap regardless. He'd have to be tired to be napping to begin with.
They restore physical damage. Gonna need something that says it wipes out sleep debt.
If I'd dis wipe out sleep debt, then Vegeta who had been kept awake worrying about the Ginyu Force would not need a nap after the senzu. He did, there his sleep debt persisted.
A guide page for the GT Hero's Journey special anime comic says Vegetto "may be even story than a super Saiyan 4!" How do you take this?
1. Z Super Vegetto >/~ GT SSJ4 Goku(first appearance)
2. Potara SSJ ~ SSJ4 relative to individual base powers
3. Vegetto SSJ3 >/~ SSJ4 relative to...