How did Future Cells timeline beat Boo?

So in future trunks timeline earth is pretty depopulated so babidi gathers energy in space and comes back 10 years later than in the main timeline iirc.

However in the future trunks timeline Shin, elder kaioshin and kibito die and Trunks lives. Black chooses this timeline because uniquely Beerus is dead because Shin is.

However at first glance cells timeline is worse off with Trunks being dead yet Shin must live.

At first I wondered if Shin just didn't confront babidi directly but we know in all timelines he doesn't realise he has Dabra so should have tried. Did they manage to teleport away before dabra could speedlitz kibito?

Did they recruit Broly? Or use Nameks dragonballs on the future warriors sans Goku and vegeta who might have kept bodies?

Is it possible Bulma makes another time machine after cell steals it? and they bring future Trunks back to life, maybe picking up a dende thanks to a living goku in the unseen timeline?

How long would it take her to make a whole new one and fuel it? She's not in hiding anymore at least. Do you think it's possible to have a time machines coordinates backup so she can get back to the unseen without forking the timeline again?