After Crystal Stars arc is finished, would you like to watch anime only sequel, similar to Saint Seiya Omega/Soul Of Gold, Dragon Ball GT/Super? For me, i would love to, especially if it had Chibi-Usa and Sailor Quartet as main characters in Neo Queen Serenity times
However, only if schedule is carefully planned, and they won't rush with production, i saw some episodes of Super, especially 5 and F retelling....don't do it again, Toei
It is complicated.
Naoko Takeuchi would have to (a) write a new original story much like CLAMP is doing with "Cardcaptor Sakura" or (b) allow a new mangaka or writer to write the story for her.
Masami Kurumada, author of Saint Seya, gave permission to a new writer to create a Saint Seyia spin-off. "Saint Seyia: The Lost Canvas," for example, was written and illustrated by Shiori Teshigori.
Would Naoko allow someone else to touch her property? I don't think so.