All Final Boss origins (spoilers obviously)

[Lambdafish]

So I just realised something today. With exception of Shinryu, every single final boss is final fantasy VII inspired (even 1.0). This might seem like a coincidence, but we are now 5 final bosses in, and 4/5 are from FFVII, has anyone else noticed this trend?

To recap:
1.0: Nael - Deliberately inspired by Sephiroth (VIIth legion, meteor project, etc.)
2.0: Ultima Weapon - Not exclusive to VII, but VII is the original incarnation of this form.
3.0: Thordan - Knights of the Round, a FFVII summon
4.0: Shinryu - FFV
5.0: Hades - A FFVII summon

It just seems odd when you write it down, especially considering there are so many other great candidates (or maybe something original?).


Edit: I've since learned that Hades was also in FFIX as a secret boss, and in FFXI, so I guess it lowers this one - I'd still like to see something not from VII though.