It could mean that in the context of the Merlin fandom, Uther's character is being depicted in a way in fanfiction that is acceptable or even favored by some fans. Maybe the fanfiction shows a different side of Uther that makes his actions more understandable or redeemable, and thus it is seen as approved within the fan community.
Uther might initially be shocked. He has always been so against magic, so he could be furious at first. He might feel betrayed by Merlin, whom he has known for a while.
One great Merlin Uther fanfiction is 'The King's Regret'. It delves into the complex relationship between Merlin and Uther. It shows how Uther might have reacted differently to Merlin's magic if he had known the truth earlier. Another is 'Uther's Hidden Affection', which explores a more emotional side of Uther towards Merlin, a side that was perhaps masked by his hatred for magic in the original series.
Maybe in the fanfiction, Uther discovers the creativity and the different perspectives on his world and characters, and he sees value in it. He might be a more open - minded version of himself in the fan - created stories.
It would be very complex. Initially, Uther would be in shock. He has been hunting magic - users, and now his son is one. But he might also feel a sense of protectiveness. Merlin, on the other hand, would be confused and angry at being lied to about his identity. Eventually, they might start to understand each other more. Uther could see the good in Merlin's magic and Merlin could see the reasons behind Uther's actions, even if he doesn't agree with them all.
Well, it could be a culmination of events. Uther's growing distrust of those around him, combined with Merlin's secretive nature about his magic. Merlin might be caught in the middle of a power struggle or a plot against Uther, and Uther, in his quest to protect his throne and Camelot, decides to eliminate Merlin without fully understanding the consequences. This would also create a great deal of drama and conflict for the other characters in the story, which is something fanfiction writers often strive for.
Power dynamics is a major theme. As Merlin is Uther's son, it affects his standing in Camelot, both in terms of political power and magical power. Also, redemption is a theme sometimes. Uther was not always kind to magic - users, and this relationship can lead to a path of redemption for him in some fanfictions.
One common theme is power dynamics. Given Uther's position as king and Merlin's as his servant, there's often exploration of how power affects their relationship. Another theme is secrecy, as Merlin has to hide his magic from Uther.
The relationship between Merlin and Uther is full of contradictions, which makes fanfiction about them really interesting. Uther hates magic, but Merlin has magic. Fanfictions can explore how they could have interacted in different scenarios, like if Uther found out about Merlin's magic earlier.
There probably is. The Merlin fandom is quite large and diverse. Some fans might be interested in exploring the consequences and emotional turmoil that would result from such a dark event as Uther killing Merlin. You can look for it on popular fanfiction websites like Archive of Our Own or FanFiction.net.
Some interesting Uther x Merlin fanfictions include 'Uther's Second Chance'. In this story, Uther is given an opportunity to redo some of his actions regarding magic after seeing the future Merlin shows him. 'The Unlikely Friendship' is also popular, as it tells the story of how Uther and Merlin form a friendship despite all odds. And 'Merlin's True Purpose in Uther's Eyes' which explores how Uther starts to see Merlin as more than just a servant as the story progresses.