I am definitely excited to see some of the characters that were cut last time such as Sailor Cosmos and Sailor Lethe and Sailor Mnemosyne. And to finally see the iconic Reinako scene finally animated.
I also hope we get to see Sailor Kakyuu's transformation scene. And since it doesn't exist in the '90s anime, they'll have to actually get creative this time.
Furthermore, I hope Naoko Takeuchi continues to supervise the films and maybe increases some of her input for one reason: I would love to see even BRIEF flashbacks (or even a single image on screen) showing what the Sailor Guardians killed off by the Sailor Animamates looked like. I'm not going to hold my breath, but considering they've added scenes to Eternal and if Naoko Takeuchi is involved again, she would be literally right there, so it's not like they'll have to completley make up the designs... The same applies to Sailor Chaos. This would be a nice bone to throw to fans considering how long we've waited for this manga to be adapted and the Shadow Galactica arc is the only arc where we have several characters mentioned with no knowledge of how they look like.
I want really good atmospheric visuals that do the manga justice. Eternal looks nice, but often flat and uninspiring. When fans conpare manga panel with Eternal frames I often think they lose a lot of atmosphere.
The galaxy cauldron and Galaxia’s cathedral have to blow me away!
Well for me specifically I would like to see a colored image of Sailor Chaos on the Stars movies. Honestly I would love if she had the same color scheme as Chaos Galaxia on the 90s anime as I think that color scheme would be perfect for Sailor Chaos and definitely looks like a dark opposite of Sailor Cosmos's look with her black Sailor Fuku, her pale white skin, yellow eyes and blood red hair. Very scary looking.
Perhaps wishful thinking on my part but I hope that at the end of the Stars movies that they would add a short 10 minute append to the end of the movie showing what the Senshi get up to after the event of Stars (Maybe 5-10 years later?) Kind of like the special act of PGSM. With the cats making an appearance, too.