Another popular pairing is Gandalf and Tyrion Lannister. Gandalf is the wise wizard and Tyrion is the clever dwarf in Game of Thrones. Their conversations would be full of wisdom and political intrigue as they both are very intelligent and can manipulate situations to their advantage.
Jon Snow and Elsa seem to be a popular pairing. The idea of the brooding and noble Jon with the powerful and reserved Elsa has a certain appeal. Their different worlds and personalities could create an interesting dynamic.
Some fans also like the idea of Tyrion Lannister and Dandelion from The Witcher being paired up in fanfiction. Tyrion's wit and Dandelion's charm could create some really humorous and interesting interactions. They could get into all sorts of mischief together in a crossover story.
Jon Snow and Daenerys Targaryen are quite popular. Their pairing in regular fanfiction was already big, and in slash fanfiction, it can take on new and different dynamics. Maybe a story where they are not just lovers but also have a more equal partnership in ruling the Seven Kingdoms, with a slashy undertone of deep emotional and physical connection.
First, know both universes well. Read the books and watch the shows. Then, find an interesting concept to combine them. For example, you could have a character from 'LotR' travel to Westeros. Next, focus on the characters. Make sure their personalities are consistent with their original versions. Also, pay attention to the language. In 'LotR', the language is more archaic, while in 'Game of Thrones' it can be more gritty. So, find a balance when writing dialogue.
Clark Kent and Arya Stark would be an interesting pairing. Clark with his superpowers and noble nature, and Arya with her assassin skills and strong will. They could learn a lot from each other. Clark could teach Arya about using her powers (if she were to gain some in this fanfic) for good, and Arya could teach Clark some of her stealth and combat techniques.
One great 'Game of Thrones' and 'LotR' fanfic I've read is 'The Convergence'. It combines the political intrigue of 'Game of Thrones' with the epic fantasy world of 'LotR'. The author weaves a story where characters from both universes meet and interact in a way that feels natural. It has some really cool battle scenes that are inspired by both works.
Bran Stark is definitely one of the most popular warg characters in 'Game of Thrones' fanfictions. His journey in the original series as he discovers and hones his warg abilities gives fanfiction writers a lot to work with. He can be placed in all sorts of different scenarios, such as using his warg powers to prevent the fall of Winterfell much earlier or having more direct confrontations with the Night King through his warging.
One popular trope is the 'lost heir' trope. In many fanfics, a character is revealed to be the long - lost heir to a great house or even the Iron Throne. This adds an element of mystery and drama. Another is the 'undercover hero' trope, where a character pretends to be someone they're not in order to achieve a greater good. For example, a spy within a rival house.
One popular trope is the 'stranger in a strange land'. Vikings arriving in Westeros or vice versa, and having to navigate the new and often dangerous culture. For example, a Viking warrior might struggle to understand the complex politics of the Seven Kingdoms in 'Game of Thrones'.
I think Iron Man and Tyrion Lannister would be a really interesting pairing. Iron Man is this brash, genius billionaire, and Tyrion is the clever, outcast dwarf in Westeros. They could bounce ideas off each other, with Iron Man showing Tyrion his high - tech gadgets and Tyrion teaching Iron Man about the political games in Westeros.