In this alternate timeline, the original Z Broly crash-lands on Earth far later than in Second Coming. Landing a few days before Battle Of Gods, he sleeps until he hears Goku scream "I will not let you destroy my world!!", awakening with amnesia, he doesn't understand what's going on, so he goes to investigate. He gets attacked at first, but eventually, after some time has passed, he's become an official Z Fighter. He has no idea of his past, and his uncontrollable power is surpressed.

Broly, frustrated, punches a punching bag. He's annoyed that he still knows nothing of his past, because Goku and Vegeta are afraid to tell him the truth.

"Ghhr... goddamn it..."