In the unaltered version of the future Light Mobius timeline, Echidnaopolis was the capital city of the Republic of Angel Island. 25 years after the hardships it had faced, the city had since become a peaceful metropolis. (StH: #131)
- The fact that Echidnaopolis exists in the unaltered timeline is odd given that the Prime Zone version of the city was destroyed and subsequently abandoned for Albion (its destruction being revealed in the "Return to Angel Island" story arc, which was published during the time "Mobius 25 Years Later" was still running). Though it's possible that the city was later revisited and rebuilt during the 25 year gap.
- On that note, it's unknown whether the city exists in the altered timeline.