Disclaimer: I do not owe the Dragon ball universes, or any Dragon ball characters, except my own characters.
A/N: I change a few things, like Dragon ball gt is after Dragon ball super, and this takes place after Trunks, Pan, and Goku collected the seven Black star Dragon Ball, while in the alternate future Trunks is building a house with Mai, trying to rebuilt the Earth.
A/N 2: When the Alternate Future Collide with their other selves. They would be known as Alt., like for example if present day Trunks met his future self, the the Future Trunks would be known as Alt. Trunks.
In the Alternate Future
"Mai, come on, we can't let him get us" Trunks said holding onto his girlfriend's hand as they rush pass the ruin buildings, trying to get to the Time Machine.
"Yes, of course" Mai said, looking serious, and bumping into Trunks back as he suddenly stopped.
"Oh, come on, son, why don't you let me protect you" a person said riding on a robot head, and feeling a spike of energy appearing on his left side.
"You need to calm down, Trunks, before you gets us both kill" Mai said placing her hand that is not occupied on his shoulder.
"Your right, sorry" Trunks said calming down and lowering his energy again, with a small smile. Trunks let go of her hand, taking a step away from her.
"Wait, Trunks, what are you doing?" Mai asked as Trunks slowly floated upwards, giving one last smile at her, before flying off towards the person, and changing into Super Saiyan 2.
"You are not my father just some kind of alternate version of him." Trunks said, blasting ki blast, after ki blast at him, creating a dust cloud, but when it clear, the robot and his alternate father appear unscathed.
"Is that a way to treat your daddy" Alternate Vegeta said looking serious, as he also turn into Super Saiyan 2.
"Not with how you took every Trunks in different timelines to be your puppets." Trunks said glaring at him and taking his sword out, holding it in front of him.
"Well, not you, or the timeline you visited before. Before you ask I've been watching you for all those years. You could have a relationship with me as father and son, all I ask is to stop resisting before things get ugly." Alt. Vegeta said with a smile when he notice that Trunks is lowering his guard down, as he is considering, but snap out of this when his Alt. Father was blasted by a weapon that Mai use.
"Mai, what did you do?" Trunks asked looking panic as it did nothing to his Alt. Father just making him mad, and having him look in the direction of Mai.
"I'm trying to save you, now get to the machine" Mai said while Trunks still look shock, as his Alt. Father look between the two of them, and aiming his hands at Mai.
"So you have a little girlfriend, which I do not approve. Earth splitting Galick Gun!" Alt. Vegeta shouted before aiming the big pink ki blast at Mai, hitting her directly.
"Noooooo!" Trunks shouted flying towards Mai, and holding her in his arms as he turned back to his original self, cradling her in his arms, with tears falling down his cheeks.
"I guess our dream can't come true now" Mai whispered, slowly raising a hand to wipe some tears off Trunks face, before lowering her hand back down, and closing her eyes, never to be open again.
"Come back, please, you were the only thing that I still have in my life." Trunks whispered to her, before kissing her forehead and lifting the two of them off the ground, putting her neatly on the side of the building. Trunks suddenly glare at his Alt. Father, while transforming to his Super Saiyan 2.
"You'll pay for this!" Trunks shouted rushing at his Alt. Father with his sword out in front of him.
"Um, no I won't" Alt. Vegeta said as the giant robot that he was riding on suddenly appear and slapped Trunks real hard at a building that unknown to them was where the Time machine is located at.
"Yes, I'm here, finally" Trunks said getting up and slowly floating to the Time machine, before hopping in and activating the machine while his whole body hurts.
"Where are you, my perfect son?" Alt. Vegeta asked looking around before noticing the time machine is flying away, but not before Alt. Vegeta attached a device to the machine, as the Time Machine suddenly vanished into thin air with an unconscious Trunks in it.
Next Time on Dragon Ball Gt
"Why did we have to crash land on a planet when the Earth is close to here" Pan complained as they exited out of the ship, stretching.
"Sorry guys" said Trunks looking sheepish while rubbing his neck.
Next Scene:
"Princess Bella, at your service" Princess Bella said holding her hand out to Trunks, which Trunks shook it, starting to feel weak, as Goku notice a yellow and blue aura around Trunks slowly traveling to Princess Bella.
Next Scene:
"Hey, grandpa, what's that?" Pan asked as Giru and Pan notice another spaceship had crashed landed next to their own.
"No, could it be, Trunks" Goku said flying towards the Time Machine, looking into the window noticing an unconscious figure in the seat. Pan looks confused before following her grandfather to the ship.