Somewhere in the multiverse.
Fu was bored; he is a scientist from the Dbz universe, studies forms, powers, and people from all of Dragon ball.
One day he was bored because there was nothing to study.
He found a universe where Nappa and Radiz have Super Saiyan forms.
A Trunks with Super Saiyan God, just nothing interesting.
So he decided to get some manga and american graphic novels.
He got some Dc comics, Marvel, One Piece, Naruto, Bleach, and Fairy Tale.
He was reading the books until a thought came to him.
Fu: "Hmmm, these universes seem pretty cool."
"It would be cool to have some death battles between the characters."
So he decided to get some heroes and villains from the different universes and have a epic adventure and battle.
In the DC universe.
The Justice league was fighting Granny Goodness?
Superman: "You are really using Darkside's henchmen to defeat us?"
Granny: "SHUT UP I WILL DEFEAT Y'ALL!"
"Ugh."
Booster gold has punched her hard knocking her out.
Booster Gold: "HA!" "An easy win!"
Suddenly, their hands start to fade away.
Green Lantern: "What is happening?!"
Wonder Woman: "I don't know!"
They then disperse.
They end up in some kind of city unknown to them.
Wonder Woman: "Where are we?"
Shazam looks at a signs that says West City.
Then all the sudden, five other fighters have appeared.
Piccalo: "What the-?!"
"Who the hell are you all!?"
Superman: "Well, we are-"
He was interrupted by Fu, who teleported to meet them.
Fu: "Well, hello heroes, how are y'all today?
Uub: "FU!"
Uub fly's up to attack him, but gets grabbed by his henchmen.
Fu: "Ah Uub, you have met my henchmen."
"Meet, Cyber Tao, Cell, Baby Vegeta, Turles, and DBZ Broly!"
Uub: "What? Why are they following your orders!?"
Fu: "See their foreheads? The F on them, that means they are under my control."
He said with a smug face.
Fu: "Well I will let y'all meet each other and I will give y'all instructions later."
"BYE!"
Fu and his henchmen teleport away.
Piccalo: "So who where y'all again?"
Superman: "We are the Justus League."
"My name is Superman." (Clark Kent) (Godfall outfit)
"I am Wonder Woman." (Diana Prince) (New 52 outfit)
"I am Booster Gold." (Michael Carter) (Normal outfit)
"I am Green Lantern." (Alan Scott) (Alan Scott uniform)
"And I am Shazam." (Billy Batson) (Regime outfit)
DBZ team
We are-
"Son Gohan" (Dbs super hero gi and cape)
"Picollo" (demon clothes and cape)
"Yamcha" (Dbs outfit)
"Tien Shinhan" (Mystic Tien outfit)
Teen "Uub" (GT outfit)
"And we are, The Z fighters!"