Like DhampyrX2, the idea isn't too bad. It is unique, but an idea like this might be too hard to write about.
I know I won't be able to and I'm not much of a writer myself as well.
I also had ideas for a Naruto/DBZ crossover too.
Here's one:
After the incident with Bojack is over because of Gohan destorying him, Trunks goes back home again to his own time world. As he leaves, his time machine ship malfunctions. What's suppose to take him back to his own time world he now ends up in a different world. After trying to get his time ship running again, he finds himself stuck in this new world because his ship won't start up again. Now he has to figure out how to get his time ship running again, all the while finding new things he has never seen in this world.
That's my idea of a Naruto/DBZ crossover.
Naruto would be Trunks first friend of course and they would mostly hang out together.
As for pairings, I would think that Trunks could be paired up with maybe... Kurenai? I don't know, I'm just giving out an idea.
As for pairing Naruto... umm... I guess whatever girl the writer wants to pair him up with.
Anyway, that's the idea I had for a Naruto/DBZ crossover. As for the plot (besides figuring out how to get back home), the can writer can make up whatever he or she wants as long as it is good.
I'm not saying your idea is bad, Veld. I just don't know if anyone is going to put the time to write out the plot for the whole idea since this would be harder to work with than most other ideas.