Dragon Ball XYZ

Important Notice
In this fanon, Battle of Gods never happened!

Intro
It is a peaceful day at the capsule corporation, 5 years after Buu, a few things have changed with the Z-Warriors. Goku and Vegeta (with the help of training with King Kai) are far more powerful than ever. Goku has mastered Super Saiyans 1-3 so he doesn't lose energy, and Vegeta was able to master Super Saiyans 1-2, and reach Super Saiyan 3, but he was unable to Master Super Saiyan 3. Now that both Goku and Vegeta can go Super Saiyan 3, when they are fused into Gogeta, he can reach Super Saiyan 4, which makes him twice as strong as Super Buu. Piccolo and Krillin had their power unlocked by Elder Kai, making them stronger than Perfect Cell. Tien, Chiaotzu, and Yamcha have moved in with King Kai so they can learn and master the Spirit Bomb, and Kaioken. Gohan was able to reach Ascended Super Saiyan 3 in his power unlocked form, making him stronger than Vegeta, but not Goku. Goten and Trunks train in the Hyperbolic Time Chamber, granting them unbelievable amounts of strength, making  the Super Saiyan 3 Gotenks who fought Buu nothing compared to them now. They mastered Super Saiyan, and are now Legendary Super Saiyans, making them half as strong as Kid Buu, which is stronger than Super Saiyan 2 Vegeta and Goku, but leaving Goku as the strongest of the Z Warriors. Finally, Uub departed to return to his family being as strong as Android 16.

Mega-Fusion Saga
One day, everyone decided to find a place to train and see how powerful everyone is compared to each other, because all of their Hyperbolic Time Chamber Time expired. But as they were flying to a city where it had a deserted field nearby that could be used as a training area, the city was in ruins. Dead bodies, fires, and collapsed buildings everywhere. As everyone was trying to figure out who could have done this, they decide to scan the area, even though they can't feel any energy besides each others. Eventually, Goten came across a man with thick black hair, and a shirt that had a symbol with the letter "r" on it twice, but the weird thing was, he wasn't injured in anyway. The man started walking slowly towards Goten, but he was about to walk right into a fire, but it was like he didn't even notice. Goten flew towards him as fast as he could to try and save him, but didn't make it in time as he walked straight through the fire, unharmed, as he teleported behind Goten and punched him once in the back, Android 17 couldn't have been happier. Meanwhile, the same exact thing happened with Trunks and Android 18. All of the other Z-Warriors were alarmed as Goten and Trunks energies decreased dramatically. They rushed individually to their locations, with Goku and Gohan arriving to 17, and Vegeta, Krillin, and Piccolo arriving to 18. Everyone was shocked to see the androids return, but as they explained how they came back, it made more and sense. These weren't the androids they knew from their timeline. They stole the time machine to come to this timeline because they originated from the timeline where Cell stole the time machine to come to the timeline they were in. Goku and Vegeta, in a fit of rage, rushed towards 17 and 18 in a desperate attack, but 17 and 18 already dodged. They said they didn't know what date the time machine was set to, or how to operate it, so they didn't know how strong the Z-Warriors would be, so they trained until they discovered the Hyperbolic Time Chamber, which sped up the training process astronomically. So now, hearing this news, everypne agreed they should regroup and relocate to the field which wasn't connected to the city, so it was still intact. Goku and Vegeta had a plan, however, because once they were in the field, they fused into Super Saiyan 4 Gogeta, and starting beating up both the androids. This is the last thing 17 and 18 would expect, however, they had a few new tricks up their sleeves too. They shot out what looked like a insanely huge green Destructo Disk with yellow electricity pulsing from it. They called it the Super Electric Slicer. Gogeta dodged it easily, but it was homing in on him at an extremely fast pace. He had an idea and punched both androids in the face to make them lose their focus on the attack, disintegrating it. The androids then set off a huge explosion as they became one. What looked like a combination of the two, which now stood before them, called itself Android Zero. Gogeta disregarded this as he shot an Instant Transmission Big Bang Kamehameha from behind Zero, but he didn't move or try to block it, as it hit it full on. When the smoke cleared and Zero recieved no damage at all, Gogeta, now back to Goku and Vegeta knew they were no match for this monstrocity of a machine. Suddenly, Goku had an idea. He told Vegeta to hold Zero off, to distract it, so Goku could do something. He had Goten and Gotenks fuse into Gotenks, who was now a Legendary Super Saiyan 3, who had to stall Zero who put up a much better fight than Vegeta. Goku tossed Vegeta a senzu bean, then they fused back into Gogeta. As their minds became one, Vegeta discovered Gokus plan and was unsure if it would work. Gogeta shot a Mega Solar Flare at Zero, then shouted at Gotenks to come fuse with Gogeta. They all hoped it would work, when... it did! All 4 warriors were now one mega warrior... Gogetenks. Due to the warriors current transformations, Gogetenks was a Legendary Super Saiyan 6. He was 15000 times stronger than Super Buu. He examined himself, then flew up to fight Zero. As they engaged in combat, he shot a Burning Big Bang Kamekameha x100 right towards Zero. Using its last resort, Zero shot an Ultra Electric Slicer, which was no match for the force of 4 of Earths greatest warriors. They were able to destroy Zero just in the nick of time because the fusion stopped right there. It seemed like everything was back to normal, however, it did toss down a capsule to the ground that Piccolo picked up, but it was unwilling to open, so he took it back to Bulma. Bulma examined it, and it was a super-futuristic model that required all kinds of codes to open. Even in 3 months time, she was unable to open this master sucurity capsule.

More coming soon!