Another theme could be the idea of redemption. Lotor has a complex backstory, and in some fanfictions, Keith might play a role in his journey towards redemption. Or vice - versa, where Lotor helps Keith in some way that leads to Keith's personal growth.
A third theme might be the exploration of their relationship in a dangerous or hunted situation. This could involve them relying on each other for survival, despite their initial differences or enmity. For example, they may have to team up to escape from a common enemy while also dealing with their own internal conflicts regarding their relationship.
A lot of these fanfictions also explore the theme of self - discovery. Through their relationship, both Lotor and Keith learn more about themselves. For example, Keith might discover a more diplomatic side of himself because of Lotor, and Lotor might find a new sense of purpose that he didn't have before. This exploration of self - discovery adds depth to their relationship in the fanfiction.
You can try searching on popular fanfiction websites like Archive of Our Own (AO3). It has a vast collection of fanfictions, and you might be able to find some related to 'Hunted Keith x Lotor' there.
Love across differences is also prevalent. Given their different backgrounds and the history between their races, the idea of them falling in love despite all that is a popular theme. For example, in some fics, they have to overcome the mistrust of their respective peoples.
The theme of friendship - turned - more is quite prevalent. They start off as acquaintances or even rivals, and then through various events and shared experiences, their relationship evolves into something deeper, be it romantic or a very deep bond of friendship that blurs the lines.
One common theme is adventure. Lotor is often depicted as leading the reader on some grand adventure across the universe. Another theme is romance, of course, with a focus on the relationship between Lotor and the reader.
One common theme is redemption. Lotor is often portrayed as a character who has done wrong but is seeking redemption, and Shiro can be the one who helps him on that path. For example, in some fics, Lotor's past actions are explored and Shiro sees the good in him that others don't.
One great Lotor x Keith fanfiction is 'The Bond Beyond Worlds'. It beautifully explores their relationship in a unique setting where they have to team up against a common enemy. The character development is really well - done.
Yes, there might be such fanfictions out there. The Voltron fandom has a wide variety of creative works, and this kind of alternate family relationship concept could be explored in fanfictions. However, you may need to search through specific fanfiction platforms like Archive of Our Own (AO3) to find them.
One possible plotline could be Keith growing up not knowing Lotor is his dad. Then, through some series of events in the story, like a battle or a discovery in an ancient ruin, he finds out the truth. This could lead to a lot of internal conflict as he has to come to terms with who his father is, considering Lotor's actions in the original series.
One common theme is the exploration of their different personalities. Lance is often portrayed as more light - hearted and Lotor as more complex, and fanfics like to play with how they interact based on this.