Board Thread:Questions and Answers/@comment-5448995-20160103010513/@comment-16461120-20160106055612

So I just read and I agree that there's no question that Roberta Mendez (Earth-BW27), Harry Mendez (Earth-BW27), Emma Mendez (Earth-BW27), and Sara Mendez (Earth-BW27) should all be renamed Roberta Mendez (Earth-928), Harry Mendez (Earth-928), Emma Mendez (Earth-928), and Sara Mendez (Earth-928).

It seems pretty likely that we're to surmise 2099 was in fact the remains of Earth-928, otherwise we'd have to try and discern why some characters are from one reality, but other's aren't, yet they all wound up in the same domain, based upon largely speculative or arbitrary reasoning.