For me: One about Snowtuft and Snowkit being the same cat, surviving the hawk attack. A small part of the book is about him learning cope with his deafness. And the rest of it tells his journey from an innocent deaf kit to a Dark Forest Warrior. Would different be interesting and a unique villain backstory.
I writing a fanfic on this, so course I'm so biased about this. A Super edition/Norevlla looking more into depth between the rift between Brokenstar's followers and the rest of Shadowclan. Not sure who's point of view this would be from as many cats could do this. I say this has a lot potential. What I'd love to see is a more mortally grey scenario, both sides being just as bad as each other. I'd like to see the opposite problem to the rogue-like Brokenstar followers, extreme Clan purists, who are full of self-rightness and try to rid Shadowclan of 'impure blood', irony becoming just as bad as the cats they're trying to fight against.
Darktail, we desperately need to know more about him.
Rock - We literally know nothing about him. What kind of ghost is he even?
A random background character - I want a random background character to get the spotlight, revealing a hidden story that's been happening right under our noses for years. Maybe some young cats were on the path to becoming the next big level, but were killed before they could. Or maybe there was an unknown evil we never knew about, but the secret crimes died alongside the hidden villains.
Cats that can't have a super edition: Ashfur... The Erins already have a biased for him. They allowed him into Starclan but if it was any other cat did the same crimes, I'd say they'd definitely be sent into the Dark Forest.
A Super Edition would probably make it so more black and white, demonizing Squirrelflight and make us pity Ashfur. Maybe even trying to justify Ashfur's actions. We already have Spottedleaf's heart for telling children terrible mortal lessons, we don't need a second; claiming if someone's family is murdered becuase they breakup with someone, than victim's fault, not the murderer.