In this alternive future timeline 17 and 18 have teamed up with a other android called Android 21 a strong and smart android then the both. They first killed Gohan then Trunks and only you as the last fighter in this timeline

Android 17: ki blast a building Alright this is no fun

Android 18: ki blast a building Yeah your right 17 this is boring to bad we killed those two humans

Android 21: Oh Gohan and Trunks those two were fun to fight but I guess thats over leans back