After the battle in the Valley of the End, Naruto and Sasuke are sent to the Dragon Ball world thanks to Fu's experiment. Starts from beginning of Saiyan Saga.
After being defeated by Future Trunks, Goku Black finds himself in a brand new world. Now, he plans to restart his Project Zero Mortals, with no Saiyans to get in the way, but will the all-powerful shinobi be able to stop him, or will they face total annihilation? Takes place two months after Boruto and DBS: Broly movies.
The crossover fic you wanted and deserve. Summary inside.