The final of the original 4 Saint Seiya films, Warriors of the Final Holy War, is probably the best of the bunch in both premise and execution. First, to go over some spoilers for the first 1/4 of the film with its main premise, having the main enemies swiftly slay the Gold Saints and that enemy being Lucifer himself with his revival being through the Cosmo of the previous three defeated Gods (Eris, Abel and Poseidon) makes it a gold standard for premises compared to the previous 3 films combined. The Gold Saints' deaths obviously shows how dangerous the enemies are, the previous Gods ties itbetter into the continuity of the main series and previous films, but the most interesting point is drawing on Biblical lore which the series hadn't really delved into beyond a few references, terms and subtle parallels. Seeing the film go full-in with it and showcasing the difference between the Greek pantheon and Biblical figures is very fitting for a series that borrows equally from both and certainly isn't out of place when the anime gave implications towards Yahweh's existence and omnipotence as well as the series being very pantheistic in general.
The way in which Athena is incapacitated here is also more interesting than most with her not only willingly putting herself up as a sacrifice, but her walking towards the point of sacrifice with some nice Biblical imagery puts a more solid visual ticking clock on her potential demise than any other one. It does avoid being close to as well done as those in the main series though when Athena believing the word of the being constantly said throughout the entire history of Christianity to be the father of lies and having that come back to bite her is ridiculous.

Unfortunately beyond that, the film follows the typical plot structure of the other 3 I've already mentioned in previous reviews, though the abilities of the Demonic Angels as well as Beelzebub's dialogue gives them far more going for them as characters than the previous films' roadblocks masquerading as henchmen. The climax also has more over the top elements to make it less generic than that of the previous 3, although the part at the end of it being through the Bronze Saints' resolve creating and miracle rather than an act of God ruins it as a battle against Satan himself is one in which a deus ex machina of the highest variety would actually be appropriate for rather than just "something, something, resolve creates miracles."

Art-wise, there's nothing to say that hasn't been said in my previous reviews. It looks as gorgeous as the other films in art and animation, other than maybe a few shots of the side of Eligor's face looking a bit off with the shading.

Overall, the last of the original Saint Seiya films still has a lot of problems with its script and screenplay, but overall has enough interest generated by its premise as well as its unique elements allow it to be marginally better than the previous film, despite suffering the same flaws. Could've been a great story in the hands of a more competent writer and with a longer running time as either its own story or a coda to the premature ending of the anime with the Poseidon Arc until we were allowed a Hades Arc adaption in the 00s, but instead it ends up as pretty looking bad filler.