Episode 166: Usagi (as Princess Serenity) was supposed to become Eternal Sailor Moon thanks to Pegasus and the Golden Crystal. We were also supposed to see the forest of Elysium fully revived, and in it, the Amazon Trio. During the ending scene, Chibiusa was supposed to stay stubborn until Pegasus finally flew away. Then she was to run after him, shouting his name. VesVes, watching this happen and feeling sympathy, then created a magical bridge to the sky for Chibiusa to run up, giving her the chance to tell Pegasus her true feelings.
So we were likely supposed to see the Eternal fuku(identical to the one in Eternal) for all soldiers in Sailor Stars after Usagi upgrades to ESM and likely the Sailor Quartet were supposed to be in Sailor Stars.