Indeed, none of that is unique to just Neuromancer, however, if you can find me other things that have all of those things. Indeed, Zion could have something else named for it, as it isn’t created by William Gibson, certainly. Of course, neither is the attire of Trinity, however, let’s compare a little further. Trinity is an excellent fighter who happens to dress exactly like Molly from Neuromancer, also an excellent fighter. Two female, secondary characters with the same patterns of attire and omnipresent mirror-like sunglasses. This is getting a little common. Now let’s add that to both works having Zion. How common a coincidence is this now? Less so. Now, add in all the other little ‘coincidences’ the two Cyberpunk tales share, and tell me just how likely it is that these were completely unrelated.
Only your way is not even remotely plausible, because the Matrix lacks dragonballs, other character parallels, or locational similarities, and Dragonball Z lacks any cyberpunk trappings beyond a few androids, again shares no characters with the Matrix, shares few themes with it, shares no place names, does not contain a similar technological future, and does not have even remotely similar style. Finally, Goku is a protagonist, while the agents are antagonists. Goku is human and emotional, whereas Hideo and the agents are more cold, weapons more than people.
I mean, you can scoff at little details as coincidences, but your argument is akin to looking at a song plagarism case and saying ‘of course both songs have a G chord in them, that’s no big deal’ and ignoring the fact that all the other chords are also the same. Sure, two stories can have a city named Zion and not be the same. Sure, two stories can have distressingly similar characters and not be the same. Sure, two stories can very similar themes and not be rip-offs. Of course, two stories can be similar in setting without ripping each other off. Two stories easily can present a similar idea of something in the future without being rip-offs. Two stories can be analogies for a Christian apocalypse without being lifts from the other. However, I think when the same two stories do all of those things, it’s pretty blatant a lift.