Well, in this fanfiction, Ursula could return with a new plan. She might form an alliance with some other sea villains this time. For example, she could team up with a group of merman pirates who have been causing trouble in the deep sea. And then, she uses their knowledge of the sea's hidden passages to her advantage, planning to take over Atlantica once again. Ariel, of course, has to gather her friends and find new ways to defeat Ursula and her new allies.
Flounder would definitely be there. He's Ariel's loyal friend and would be by her side to help face Ursula again.
One possible plot could be that Ursula, resurrected with dark magic, seeks revenge on the Little Mermaid. She might try to take away Ariel's newfound happiness, like her relationship with Prince Eric. Maybe she creates new spells and illusions to deceive Ariel and those around her.
Well, perhaps Ursula comes back with a vengeance. She might try to take over the underwater kingdom again. Maybe she targets Ariel once more, but this time Ariel has new friends or powers to defend herself.
Ursula as a mermaid in fanfiction might also explore her backstory more deeply. She could have been a mermaid princess in a far - off part of the ocean. But due to a power struggle or a curse, she lost her status and became the villain we know. This could add a lot of depth to her character and make the fanfiction really engaging.
Prince Eric could be a main character. He would be important as he is Ariel's love interest. Also, King Triton, Ariel's father, could play a significant role as he would be concerned about Ursula's return and want to protect his daughter and the kingdom.
One interesting fanfiction could be where Ursula returns with a new and more devious plan. Maybe she disguises herself as a friendly sea creature at first to get close to Ariel again. She could offer Ariel a new deal that seems too good to be true, but of course, has a hidden, malicious intent.
In some Ursula - wins fanfiction, the prince could also play a different role. Instead of falling for Ariel, he could be under Ursula's spell. Ursula could use this to her advantage to gain more power on land as well as in the sea. This would change the whole dynamic of the story, as it's not just about the sea world anymore but also about Ursula's expansion of her power across different realms.
Flounder could be a main character. He might be the one who first discovers Ursula's resurrection and warns Ariel. Prince Eric could also play a major role. He could lead the human side in a fight against Ursula if she decides to attack the surface world.
Often, Ursula is depicted as a more nuanced character. She could be seen as a victim of circumstance in some fanfics.
In some Little Mermaid fanfiction, Ursula's origin might be depicted as a once - kind sea creature who was wronged. For example, she could have been betrayed by the mermaid royalty in the past, which led her to turn bitter and embrace dark magic.