Disclaimer: I don't own Naruto, DBZ, or any other anime that may be mentioned.
13 Years later
A Thirteen year old boy was sitting high in the sky in a place known as kami lookout. He has black hair with three bangs going down his face and hair is raised up in the back, he was in a blue train gi with white saiyan armor he also has a long brown tail. His name is Son Naruto eldest son of Son Goku and Chi Chi he was three year older that his younger brother Gohan. He is also Naruto Uzumaki that was absorbed in to the vortex his last effort to save himself sent his soul to an unborn body and was reborn as Son Naruto.
Naruto has all his other life memories and also want revenge against his old village but is also happy with his new life born in the Son's family.
He gained strength far beyond any thing he could have hoped for in his old world and also friends and family as well.
Naruto was pulled out of his thoughts as he sensed to high power coming from the Hyperbolic Time Chamber.
He saw both Goku and Gohan walk out out of the chamber as a Super Saiyan. Naruto and everyone stared at the two of them in surprise as they both were super saiyan but more calm than normal.
"They finally done" said Naruto.
"What! They're finished already? It hasn't been a year yet" said Vegeta.
"Alright, nows my turn to use the Chamber" said Naruto while everyone started at him in shock.
"Are you going in alone?" Tien asked as Naruto nodded.
"Yeah I'll manage" said Naruto.
"Good luck son" Goku said as he pat Naruto's back.
"Good luck brother" said Gohan as Naruto turned and smiled at Gohan.
"Thank Gohan, dad" Naruto said as he walked past everyone to the Hyperbolic Time Chamber.
Hyperbolic Time Chamber
Once Naruto entered he was effected by the 10x gravity and harsh conditions of the room and saw a white endless void.
Weeks later
As he was training each day doing harsher training to get stronger before achieving Super Saiyan. He remember Piccolo telling that the gravity and harsh conditions increased for every 5 mile by 10 x more then the beginning.
With the his healing factor he could do more extreme training, since Naruto's body adapt to weight or gravity increase in few day's to where he can move like normal.
Now Naruto was in the 10-15 miles range where the gravity and conditions was 100x greater than the the beginning of his training in the chamber.
Naruto used serum he created back in the Elemental world he created this serum to allow him to heal or adapt his cells to changes so that his body can evolve and get stronger also heal faster. Naruto created the serum to protect himself from the villagers, if they try anything against him and kyuubi couldn't help. He first used the serum on his body on planet Namek when he almost died from Frieza's death beam.
Now the serum not only heal his body faster but also allows his body so adapt and get stronger as he get injured or during fights it also increase his durability so he can never be harmed the same way twice. Naruto was happy by the new ability like reactive adaptation he got but like the thrill of a fight, so he can turn it of when needed.
Naruto was 14 miles into the chamber the gravity was 1000x stronger than outside, Naruto achieved Super Saiyan few day's ago by fighting with his ki enchanted shadow clones unlike normal shadow clones these doesn't pop with a small his the ki act as a defense to protect the clone from damage.
Months Later
Naruto in base battling against 5 Super Saiyan clones of himself all bruised and damage while heavily panting. He the stared at his clones before releasing a white aura powering up and kicking clone 1 in the chest causing it to fly black he then hit it with a Ki blast destroying it. Clone 2 tried to attack from behind but Naruto Teleported behind clone 2 and stabbed it with a Ki Blade. Clone 3 and 4 worked together to attack which put Naruto on the defensive for a while before he found his opening and released a Ki wave pushing them back them used to Ki blast to destroy them.
He then started looking for the last clone around but the clone was about with a Kamehameha ready to fire Naruto countered with his own and was getting pushed back before his aura turned green and eyes yellow and the blue Kamehameha changed to green and fired back at the clone over powering and destroying it.
Naruto achieved this form after Super Saiyan when he was trying to control is great ape form in human form he call it Suppressed Great Ape or Wrath since its powered by rage and destruction.
Naruto dusted himself off before look at the sand glass at the Chamber door.
"Its almost time to leave" said Naruto before transforming to Super Saiyan and suppressing his powerlevel before going for the door to leave the chamber.
1 Day Later Outside World
Naruto when deeper in the chamber to where the gravity was 100000x outside and honing his skills and mastered Super Saiyan. Naruto was confident he could defeat Cell at full power unless Cell was heavily suppressed, Naruto suppressed his power level as a Super Saiyan and walked to the door.
Kami's Lookout
Everyone was waiting for Naruto to finish in the Hyperbolic Time Chamber.
"Where is the brat, he should be out by now!" shouted Vegeta in irritation
"Father, calm down. We have ti.." Trunks told Vegeta before stopping when he sensed Naruto's energy.
They all jaws dropped when they saw Naruto as a Super Saiyan wearing a damaged Saiyan Armour.
'That's Naruto? I barely recognized his power' though Piccolo, as everyone else.
" Well it's been a while. Why is everyone staring at me?" asked Naruto with a confident smirk.
He talked to everyone before he went home with Goku and Gohan.