The original plan was to upgrade Sailor Moon to Eternal Sailor Moon in Ep. 166 and likely the other Senshi in 172 but that did not materialize, changing the people involved made it much worse because they scrapped the originally planned plot of Sailor Stars as well as the final episode of Super S.
Ikuhara also scrapped his original plan for Sailor Moon to upgrade to Eternal in Episode 166, I think that might have not happened if he was part of Sailor Stars.
Elios was originally planned to return in Neherenia Arc as well.
Ikuhara also scrapped his original plan for Sailor Moon to upgrade to Eternal in Episode 166, I think that might have not happened if he was part of Sailor Stars.
Elios was originally planned to return in Neherenia Arc as well.