[It sure is, he's going through a rigorous training simulation, all those DBZ explosions happening and all that, and that energy signal couldn't be mistaken. But he just finished! Aren't you lucky Trunks, and he's leaving the chamber and making his way out when he spots his son.

But see, Prime Trunks wore that outfit once already in front of him here. Sooooo he just thinks that Future Trunks is Prime Trunks and

yep this will go well]

Trunks! Good to see that you've decided to show up. I thought you were taking the day off. And you're in luck, I just finished my own training. But I can make time for more. [He grins, sparring with his son was actually pretty fun.]