In a fanfiction, it could be a plot twist that the zombies are evolving in a way that they start to regain some memories of their past lives. Little Rock stumbles upon a group of these 'evolved' zombies and has to decide whether to try and communicate with them or just keep fighting them, as they seem to be showing signs of their former humanity.
Maybe Little Rock finds a hidden bunker that seems like a perfect safe haven. But once she enters, she realizes it's a trap set by a group of raiders who want to use her as bait to attract more zombies to their area so they can pick off the zombies and take their supplies. She has to outwit them to escape.
A great plot twist could be that Little Rock discovers that one of the people she thought was a human survivor is actually a half - zombie, with some human intelligence remaining. This person has been secretly guiding the zombies' movements, and Little Rock has to figure out how to deal with this new threat.
Another fanfiction could be about Little Rock getting separated from the main group and having to survive on her own in a completely new and dangerous area. She has to quickly learn new survival skills, like how to communicate with a group of survivors who don't speak her language but are also fighting against the zombies.
One possible plot could be a group of survivors arriving in Little Rock for the first time. They think they've found a safe haven, but soon discover it's full of hidden dangers. They have to quickly adapt to the new environment, deal with different types of zombies they haven't seen before, and figure out how to survive.
One plot idea could be Tallahassee and Little Rock getting separated from the group during a zombie horde attack. They then have to rely on each other's skills to survive. Tallahassee's tough - guy attitude and Little Rock's resourcefulness would make for an exciting adventure as they find their way back to the others.
I'm not sure specifically which 'first time' fanfiction you're referring to in Zombieland: Little Rock. There could be many different takes. It might be about a character's first encounter with Little Rock in the zombieland setting. For example, it could describe their initial shock at seeing the desolate yet unique environment of Little Rock filled with zombies and the challenges they face for the first time.
Perhaps Little Rock starts to teach Tallahassee some of her more unique survival skills, like making traps out of ordinary objects. As he learns from her, he gains a new respect for her, and their relationship becomes more of a partnership.
What if Jack and Little Red find out that the entire woods is an illusion created by a powerful sorcerer? The sorcerer has been testing them all along. Once they realize this, they have to find a way to break the illusion and face the real world outside the woods. This would completely change the setting and nature of their adventures in the 'woods'.
One idea could be a story where characters from Tallahassee and Little Rock meet by chance during a cross - country trip. They start off as strangers but gradually discover they have a lot in common, like their love for local music. As they travel together, they learn about each other's hometowns and cultures, and a budding romance begins.
Maybe in the fanfiction, it turns out that the mermaids in 'The Little Mermaid' are actually part of an ancient prophecy related to 'Gravitation'. For example, they are the key to saving the world in 'Gravitation' from some sort of musical apocalypse. This would turn the whole story on its head as the characters from 'Gravitation' would have to rely on the mermaids and their unique abilities, which are completely different from what they are used to in their own world.
One interesting plot twist could be that one of the main characters who was thought to be a victim in the Dollhouse turns out to be secretly working with 'A'. This would completely change the viewers' perception of that character and add a new layer of mystery. Another could be that the Dollhouse has a hidden exit that was created by a previous captive, but this knowledge has been lost over time. It could lead to a race among the girls to find it.
A plot twist could be that the wolf is actually a cursed prince. When he blows on the pigs' houses, it's because he's trying to break the curse by performing a certain task. The pigs find out about this and instead of fighting him, they help him break the curse. In return, the prince (formerly the wolf) rewards them handsomely.