All of Toriyama's statements about Goku & Co's Strength

[kriss-]

Did you consider any other ways for Goku to level up other than going Super Saiyan?

At the time, I didn’t really have the time to come up with multiple ideas, so that wasn’t going to happen.

Why did you set the story’s time frame after the defeat of Majin Boo?

It’s when all the members [of the cast] were at their strongest, so I thought it was just right. If it were at the time of the final chapter, Goku would be heading off somewhere with Oob, after all.

With regards to the time frame of “for the first time in 39 years”, the movie’s setting is after the defeat of Majin Boo, and also prior to the final chapter. Why is it that you chose this period?

When I decided, “For this movie, let’s go with the whole cast!” I thought, “What era would be best?” If it’s a few years after the “Majin Boo arc”, then almost all the cast members are at MAX strength…. And also, you know, in the final chapter, where Oob appears, I made [characters like] Bulma and Kuririn pretty old, so honestly, I thought, “Maaaybe it’s a biiit difficult” [to make the time period any later]. (laughs)

Why did you choose this period?

The fact is, I thought, “Man, I really made everyone old in the last chapter of the manga”. I even gave Vegeta a mustache (laughs). So, I chose this period because everyone had got to maximum strength. A few years after the “Majin Boo arc”, and before Pan’s birth.

Did you decide on the movie’s sub-title, Sensei?

I did. Gods and aliens are a staple of mine10, after all. (laughs) But, the title being the title, I was careful not to make it philosophical. So I had him do some un-god-like things, such as being obsessed with food. As a rule, I love dumb things like that.

I’m also responsible for setting the timeframe after the Majin Boo arc. I thought a time where the whole cast is together, and Goku & co. are at nearly perfect strength, would be best. That’s where an incredibly strong foe appears.

Akira Toriyama:

The keywords this time, “God of Destruction Beerus” and “Super Saiyan God”, were suggestions from the scriptwriter, but they were good ideas for presenting a crisis for the main characters, who had grown so strong that they’d reached a point where there was nothing higher.

How did you feel as you were drawing the final portions of the series?

The Artificial Human and Cell story arc was pretty rough… I guess you could say I did all I could with Freeza, so I was burned out, and figured I couldn’t pull off a better battle than that. I thought, “Do I really have to keep going?” Even when Cell ended, it still didn’t feel like it could end. So before the Boo story arc began, I said “Once this next thing wraps up, I want to end it no matter what.” Because I thought there was no way for any stronger guys to pop up, or for Goku to get any stronger than he already was.

I had to read essentially every fucking interview on Kanzenshuu in order to dig all this up.

 

[Evil Vegeta]

Appreciate the quotes.

 

[kriss-]

Because the 6, 10 and 15 figure was made directly for Battle of Gods -and because nothing in Dragonball Super really tells of how Goku's Saiyan God powers stack up against Beerus, anything Akira Toriyama says during his interviews regarding the movie should only be applicable to that specific film and have no bearing on the events in Super. Clearly, that particular scaling contradicts various feats and statements.

 

[xmysticgohanx]

if you wanted to be technical, he said they're at their max power a few years after the Majin Boo arc.

So DBS SSJ3 Goku > Ultimate Gohan > SSJ3 Goku can work. I have Gohan = Boo arc SSJ3 iirc

Or if Evil Boo = Fat Boo
and if Pure Boo ~ SSJ3 Goku

Ultimate Gohan vs Evil Boo's gap is bigger
than Pure Boo vs Fat Boo

So I guess Ultimate Gohan is stronger. Not by much though

 

[kriss-]

Well technical speaking, Akira Toriyama's 6-10-15 figure is contradicted by the new material; therefore the logical determination is that any statements pertaining to Battle of Gods are entirely exclusive to Battle of Gods.