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.