I really liked Future Trunks in Dragon Ball Z, and I did favor him too in Dragon Ball Super.
He appears out of nowhere and arrives at Bulma’s mansion. He’s incredibly hurt and when Goku gives him a senzu bean, he attacks Goku on first sight.
Turns out Trunks was running from a being known as Goku Black. He escapes to the past to see if he could get some help.
In the end, Trunks defeats his nemesis with the sword attack resembling the energy of Goku’s Spirit Bomb.
Future Zeno erases Trunks’ Earth from existence. Whis manages to alter time to give Trunks a future where the Earth is still around but Zamasu is not.