Board Thread:Inclusion debates/@comment-4028641-20150906221018/@comment-5918438-20160102005740

Those stories were not intended to be set within the DWU, so they can't just be retconned into it. Even if later stories, supposedly taking place in those universes, are deemed valid, information from the invalid source could only be placed in behind the scenes sections, where we can say the character originated in an invalid source.