A possible plot could be that there's something special about the baby because of their alien heritage. Maybe the pregnancy progresses differently compared to a normal human pregnancy. They could discover that the baby has unique powers or abilities that start to show even before it's born. This would add an element of mystery and danger as they try to protect the unborn child from those who might want to use its powers for their own gain.
For Michael's family, if they have been in hiding or trying to keep a low profile in Roswell, the pregnancy could be a big threat to their secrecy. They might be hesitant to get involved for fear of attracting unwanted attention. Maria's family, being human, might have a hard time adjusting to the idea of having an alien - related pregnancy in the family. They could initially be resistant, but over time, with understanding and seeing Michael and Maria's commitment, they might come around.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of Roswell fanfictions, including many about Michael and Maria. Another place is FanFiction.net. There are also some Roswell - focused fan communities on social media platforms like Tumblr, where users might share or recommend good Michael and Maria fanfictions.
One great michael and maria roswell fanfiction is 'The Unseen Bond'. It delves deep into their relationship, exploring how they deal with the challenges in Roswell. Another is 'Michael's Hidden Feelings' which focuses on Michael's inner thoughts regarding Maria. And 'Maria's Discovery' shows Maria finding out new aspects about Michael that she hadn't known before.
One possible plot twist could be that the father of Maria's baby is not who she initially thought. Maybe there was some sort of mix - up at a fertility clinic or she was deceived by someone she trusted. Another twist could be that Maria discovers she has some sort of alien - related pregnancy, given the Roswell theme, which could bring in all sorts of strange powers or abilities for the unborn child. A third twist might be that Maria decides to keep the pregnancy a secret from most of the people in Roswell, but as she tries to hide it, she gets into all sorts of comical and tense situations.
She could be pregnant with a half - alien baby, which causes a stir among different species in the Star Trek universe. Some might see it as a new opportunity for inter - species relations, while others could be fearful or prejudiced.
It could be Michael. Since they have a complex relationship in the Roswell series, it's possible that their relationship takes a new turn and he is the father. Maybe they had a passionate night together that led to the pregnancy.
One idea could be that the alien technology from Roswell somehow finds its way to Smallville. The kryptonite in Smallville could have an unexpected reaction with the alien biology from Roswell. Maybe the characters from Roswell come to Smallville in search of a new energy source and end up getting involved with the local mysteries and the Kents.
The belly ache could slow her down. If she's usually an active character in the Roswell story, this pain might prevent her from helping her friends or getting involved in important events right away. For example, if there's a big alien - related event happening, she might miss it because she's in too much pain.
A crossover with 'Stranger Things' would also be cool. The kids in Hawkins could encounter the Roswell aliens. The Roswellians' advanced technology might help the kids fight the Upside - Down monsters, or perhaps there would be some miscommunication at first due to their different worlds and concepts.
Well, in Roswell Stargate crossover fanfiction, there might be a plot where the characters from Roswell get involved in Stargate missions. Imagine the Roswell gang having to deal with the Goa'uld or the Replicators. It could also be about how the technology from Stargate affects the lives of the Roswell aliens. For instance, the Stargate could be a way for them to find a cure for their alien - related problems or a means to enhance their powers.