- History 1 is the main world.
- History 2 is Future Trunks's world.
- History 3 is the alt. History 2 in which Cell originates.
- History 4 is the alt. History 3 in which Future Trunks acquires the blueprints to deactivate the Androids.
- History 5 is the alt. History 2 in which Beerus never destroys Zamasu.
1. Timeline 1 is Cell's world, where Future Trunks was sent back in time by Bulma, came back, and got killed in his celebratory trip back.
2. Timeline 2 was created when Universe 12 sent someone back in time
3. Timeline 3 was created when dead Future Trunks was sent to warn Goku about the heart virus
4. Timeline 4 was created when Cell from timeline 1 entered a different time period in the time machine than his own Future Trunks would have, severing the link between timelines and returning to his larva state and burrowing himself to grow.
This is the main canon timeline, the one we follow in the show.
Since Trunks still ends up appearing in Timeline 4, then that means he came from yet another timeline since he doesn't fit in any of the ones listed thus far.
5. Timeline 5: The canon Future Trunks timeline.
Only now do we even get to Super. And keep in mind, every single one of the timelines listed thus far should have alternate timelines due to how MWI works, but i'm not gonna delve into them since it's already confusing enough.
6. Timeline 6: The timeline where Goku Black originates from, stealing Goku's body
7. Timeline 7: The timeline created by Beerus killing Zamasu
8. Timeline 8: The timeline Whis brings Future Trunks and Mai into, identical to the canon timeline (Timeline 4)
9. Timeline 9: The existence of Timeline 4 entails the existence of Timeline 1 due to Cell, therefore the existence of Timeline 8 entails the existence of Timeline 9.
10. Timeline 10: The existence of Cell in Timeline 9 entails the existence of his own dead Future Trunks, which entails the existence of a copy of Timeline 3.