So.
In regards to the canonicity of the various spin-offs, I agree that Kurumada being credited as the author is pretty damning. But as we've briefly touched on on Discord, this has a few key issues, namely because of the fact that there is supposedly only one version of each god in the multiverse. How would we rectify that with the story of GA, where we are presented with a Seiya who battled Hades in Elysium and is still actively suffering from his curse, with the story of ND, where Seiya had a limited time before succumbing to the curse? And, if these are two seperate timelines, wouldn't that contradict the singular gods hypothesis, seeing as there would have to exist at least 2 versions of Hades' true body for both timelines?
Outside of the canonicity portion of the OP, I would also like to tackle the Acausality proposal. Wouldn't it actually just be type 4 instead of 5, considering this note in the
Acausality page "note: Being completely independent of time or laws; or similar forces, does not make you completely independent of causality without the relationship between these forces and causality being clarified, with it only being considered as evidence for an irregular relationship with causality otherwise"?
Finally, I agree with Hasty regarding Karma. It's fine either or.