Thread:ADour/@comment-27733967-20170926132003/@comment-3406131-20170926212101

His reply:

Hi Armel,

I found your message very clear and easy to read!

I'll have to get back to you on Blackwulf, but Earth-0 is a different story.

Despite similarities, Reality-92131 is the X-Men cartoon reality, which is not the same as the Adventures of the X-Men series reality.

Further, "Earth-0" is specifically in quotes as it is not a true designation. It is a reality designation for a reality from the previous multiverse.

Regardless of the designation of "Earth-0," it is not the predecessor of Earth-616. It is just the reality that brought about the end of the previous multiverse (via the M'Kraan destruction). After that, a new multiverse arose, of which Earth-616 is only one reality. The information is covered in the OHotMU entries on the M'Kraan Crystal, Galactus, D'Spayre, and the Dweller-in-Darkness, at least. Possibly also the Phoenix Force +/- the Living Tribunal. The M'Kraan and Dweller have Appendix entries, which should cite all sources of information.

And, yes, it is becoming increasingly clear that Marvel and DC are no longer (if they ever were) paying attention to designations from each other, so those designations don't necessarily count anymore...

Thanks, and have a great day.