Neither Goku nor Future Trunks would have arrived on Earth?

[SIAD]

I mean what would have happened if Goku had stayed in space and Future Trunks had not yet reached the Main Timeline when Mecha Freezer and King Cold arrived on Earth?

  How would the story have developed?

 

[Let's Go Fearless!]

* Vegeta and the others would destroy Frieza's army.
* Either Gohan or Vegeta will somehow turn into a SSjin to finish Cold.
* Frieza fights with Gohan (SSjin) while others are down. Maybe a beam struggle will finish Frieza for good.

 

[withheldforprivacy]

Freeza wins.