Official consensus is everyone throwing their hands up in the air and screaming COMICS into the sky.
Honestly, you could go either way with this one. You could use 'Earth-A' continuity (which seems to be referenced here) and treating any discrepancies or canon non-compliant 'hiccups' as the result of an alternate universe.
Or
You could just roll with the retcons and assume that it's always been a part of the main 616 continuity, and gently airbrush any inconsistencies until they're no longer an issue.
We're fine with either, since both are equally valid. It depends on your comfort level and preferences.
no subject
Honestly, you could go either way with this one. You could use 'Earth-A' continuity (which seems to be referenced here) and treating any discrepancies or canon non-compliant 'hiccups' as the result of an alternate universe.
Or
You could just roll with the retcons and assume that it's always been a part of the main 616 continuity, and gently airbrush any inconsistencies until they're no longer an issue.
We're fine with either, since both are equally valid. It depends on your comfort level and preferences.