One common theme could be 'alternate universes'. Fans might write about what would happen if the two actors' characters from different shows met in a different world. For example, if Joshua Jackson's character from 'Fringe' met Katie Holmes' character from 'Dawson's Creek' in a modern-day New York City setting.
Some niche fanfic forums might also have what you're looking for. These are often smaller communities that are really into specific actors or shows. You could try searching for forums related to the shows that Joshua Jackson or Katie Holmes have been in. The fans on these forums might have created some great fanfiction based on their admiration for the actors.
One popular theme is romance. Fans often write about his character falling in love with other characters from the shows he's in or creating new love interests for him. For example, in fanfictions related to 'Dawson's Creek', there are many stories about his character Pacey's romantic adventures.
Katie Holmes and Tom Cruise had a highly publicized love story. They met and quickly became a couple. They were seen as a glamorous Hollywood pair. They got married and had a daughter together. However, their relationship faced a lot of media scrutiny. Eventually, they divorced.
You can try websites like Archive of Our Own (AO3). It has a large collection of fanfictions on various topics and characters, including Joshua Jackson. Just search for his name in the search bar and you'll get a list of relevant fanfictions.
They first met and the relationship developed from there. Tom Cruise's charm and Katie Holmes' beauty might have been the initial attraction. They began to spend time together, and as they got to know each other better, their relationship grew deeper. It was a high - profile relationship from the start, with the media closely following their every move.
One key event was their meeting which led to them becoming a couple. Then their wedding was a huge event. The birth of their daughter Suri was also very important. And finally, their divorce was a significant event that ended their relationship.
Well, their love story started like many modern romances. Joshua Jackson and Jodie Turner - Smith likely crossed paths in the entertainment industry. They must have been drawn to each other's personalities. They started dating and were seen in various places, enjoying each other's company. Their love seemed to grow as they faced different situations together, building a relationship based on trust and love.
First, you need to understand the characteristics of both universes. For 'Percy Jackson', know about the Greek gods, demigods, and their powers. For 'Sherlock Holmes', study his deductive methods and the Victorian setting. Then, think of a plot that can combine these two elements. It could be a mystery that only Percy's powers and Sherlock's mind can solve.