ZERO7772 said:
So, did the novel mention if Gogeta used his full power near the end of the fight or not? Was that his full output or just a hint of true power?
Kinda a bit late, but heres what the novel has to say about that fight
The dude in kanzenshuu (MShadows) was nice enought to translate and provide raws
https://www.narutoforums.org/threads/dragon-ball-super-broly-novel-translations.1158464/
This part is after the stardust braker (Brolys final power up)
"With a tremendous shout, Broly blows away the flames that were engulfing him. Afterwards, letting out a ferocious growl he goes low and dashes forward leaving behind a shock wave.
But even after seeing that Gogeta did not move. Just as Broly's kick was about to hit, Gogeta softly ascends and then comes down with a counter kick. Broly blocks it by crossing his arms, but since his side was wide open Gogeta lands a direct roundhouse kick on him.
Broly gets blown away, but as he lands he readies his stance in order to launch a ki blast. Gogeta dodges the massive energy blast coming his way by simply leaning back with half his body, and then dashes instantly towards Broly with a punch.
As Broly is being blown away, he launches a volley of continuous ki blasts from his palm. Gogeta easily dodges them and then begins a continuous assault of punches on Broly.
Gogeta pulls back from the now swirling Broly, crosses his arms and raises his ki. Astonished at the surging pressure, Broly used what power he had left to prepare to intercept him.
Gogeta and Broly's fists collided. The sheer pressure of their clash blows away the surroundings and lava erupts from the ground. Broly could be seen screaming as if crying for help as he had been blown away by the impact. His hair had turned back golden and his facial expression was distorted with pain.
Gogeta pursued him instantly, and drove a fist packed with enough ki straight into Broly's stomach. As Broly is blown away, he moves in and lands another hit. He then accelerates and drives a fist charged with compressed ki into him.
Entrapped by Gogeta's ki, Broly's body starts trembling as if electrocuted and rises into the air. Together with a shout, Gogeta detonates all the ki that was gathered inside of Broly's body. The pale energy that was seeping out of Broly's body caused a giant explosion.
The resulting shock wave could be felt all the way to the high ground where Bulma had taken refuge and had been watching the battle unfold with Whis.
"Amazing!" Whis said with praise. "I believe this should settle the match."
Meanwhile, Gogeta had assumed the charging pose of the Kamehameha. Gogeta lowers his waist and gathers his hands together around hip level.
"Ka21:21, May 10, 2019 (UTC)~~"
Between his cupped hands, a sparkling ball of ki began to form and gradually increase in size.
"Me21:21, May 10, 2019 (UTC)~~"
On the other side of the dust that was being blown away by the wind, a Broly who was tumbling as he tried to get up could be seen.
"Ha21:21, May 10, 2019 (UTC)~~ Me21:21, May 10, 2019 (UTC)~~"
Having completely lost the will to fight, Broly began to mumble in fear.
"A... A... A..."
"HAAA21:21, May 10, 2019 (UTC)~~!!"
The Kamehameha Gogeta had launched was shaking the very ground. As the light holding catastrophic levels of power approached Broly, all he could do was cower in fear.
Just then! "Please send Broly back to the planet from where he came from!" Cheelay's words resounded as she shouted. In an instant of motionlessness, Shenron made Broly disappear.
After Gogeta finished firing off his Kamehameha, an expression of surprise could be seen on his face as he witnessed Broly disappear in a flash of light. That light had instantly crossed a long distance and reached a planet with a rather rugged landscape. That planet was Planet Vampa.
When he came to realize, Broly was sitting by himself in a terribly familiar place. That dreadful enemy was no longer around. That unpleasant white guy was no where to be seen either. His whole body hurt, so much that he couldn't even breathe. But even so... Overlooking the nostalgic landscape before him, Broly thought... Even so, Broly was free. "
Nothing about Gogeta using his full power. It affirms how far superior Gogeta was compared to broly, and how easily he was dodging and pummeling him.