A possible plot twist is that the kiss is part of a prophecy. In the TMNT universe, there could be an ancient prophecy that foretold of a kiss between Leo and April which would either save or doom the world. So after the kiss, they start to discover clues about what this really means for them and their friends. Or perhaps the kiss is seen by an unexpected observer who then spreads false rumors about it, which leads to all sorts of misunderstandings within their community.
One possible plot twist could be that the pregnancy is not what it seems at first. Maybe it's a result of some sort of alien or mutagenic influence that is making April appear pregnant but it's actually something much more dangerous. For example, it could be a parasite that is using her body to incubate its young. Another plot twist could be that Donnie discovers a way to reverse the pregnancy because he realizes that the world they live in is too dangerous for a baby. Or perhaps, the pregnancy reveals a long - hidden connection between April and the Turtles' origin that no one expected.
A common plot twist could be that April was actually kidnapped by someone she thought was a friend. This person could be under the control of a greater evil. It would add an element of betrayal to the story.
The other Turtles might be shocked at first. Donnie would probably start analyzing the situation, trying to figure out if it was a smart move or not. Mikey might make some jokes about it, while Raph would be more skeptical and might even be a bit angry, thinking Leo is making a mistake.
In this fanfiction, the plot might revolve around the mystery of how April got pregnant in the first place. Since they are from different species, it could be some sort of magical or scientific anomaly. Donnie would be on a quest to understand it while also taking care of April. They could also have to deal with the reactions of the human world if the pregnancy becomes known. There could be a sub - plot where they search for a safe place to raise the baby, away from both human and mutant threats.
Well, one possible plot could be that Leo discovers an abandoned baby during one of his patrols. He decides to take the baby under his wing and protect it. His brothers are initially skeptical but soon come around. They then have to figure out how to take care of the baby's basic needs like feeding and clothing while also keeping it safe from the various threats in their world.
One possible plot twist could be that the kiss is part of a genjutsu. Maybe an enemy has put Naruto under a genjutsu, making him see Tayuya in a different light and be compelled to kiss her. When he breaks free from the genjutsu, he has to deal with the confusion and guilt.
One possible plot twist could be that their kiss is part of a spell gone wrong. Maybe they were trying to combine their powers to defeat a powerful enemy, and the magic misfired, resulting in an unexpected kiss. This could lead to a series of comical and confusing events as they try to figure out how to reverse the spell without losing their newfound closeness.
Perhaps the kiss is a result of some magical or psychic Pokémon's influence. For example, a Psychic - type Pokémon might be playing matchmaker and uses its powers to make Ash and Iris kiss. But then, when they realize what has happened, they have to decide if they actually have feelings for each other on their own, without the Pokémon's interference.
Well, a plot twist could be that Loki kisses Darcy as a way to gain access to something she has. Like, she has a key or a piece of information that he needs. But then, he actually starts to develop real feelings for her during the process. It adds an interesting layer of conflict, between his initial motives and his newfound emotions.
One possible plot twist could be that their kiss is part of a magical spell gone wrong. Maybe Ursula was trying to steal Ariel's voice again with a new spell, but instead, the spell backfired and made them kiss. This could lead to a strange alliance between them as they figure out how to reverse the spell.