It's popular because it combines different beloved universes. Fans of both Harry Potter and another series get to see their favorite characters interact. For example, a crossover with 'Marvel' would let us see Harry Potter with the Avengers. It creates new and exciting storylines that we wouldn't get in the original works.
One idea could be that the characters from 'Got' somehow end up at Hogwarts. For example, Jon Snow could be a new student who is really good at Defense Against the Dark Arts because of his combat skills. He might struggle with the magical aspects at first but quickly adapt.
One great example could be a crossover with 'Lord of the Rings'. Imagine Harry Potter and his friends in Middle - earth, facing the dark forces there. Another is a crossover with 'Percy Jackson'. It would be interesting to see how the wizarding world and the demigod world interact. There's also the possibility of a crossover with 'Sherlock Holmes', where Holmes tries to solve the mysteries in the magical world of Harry Potter.
In a crossover, the dragons in 'Got' could be related to the magical creatures in 'Harry Potter'. Maybe they are a long - lost, more powerful version of a magical beast. Their fire - breathing ability could be enhanced by magic spells, and they could be used in battles against the Death Eaters or other dark forces. Daenerys could learn some magic from Hogwarts professors to better control her dragons.
Sure, it's quite possible. Fanfiction writers love to blend different fictional worlds. In a 'The Mummy (2017)' and 'Harry Potter' crossover, we could see the mummy's powers being pitted against the spells of Hogwarts students. Maybe the mummy is brought back to life in the wizarding world and causes chaos. There are endless possibilities for interesting storylines in such a crossover fanfiction.
One idea could be that Tinkerbell finds her way into the wizarding world of Harry Potter. Maybe she gets accidentally transported there by some magical mishap. She could use her fairy magic in Hogwarts, like helping to repair broken objects in a more sparkly and unique way compared to the Reparo charm.
A popular one is 'Fem Harry and the World of Middle - earth'. This fanfic is really interesting because it crosses over the Harry Potter universe with Tolkien's Middle - earth. Here, Fem Harry has to adapt to the very different cultures and magic systems in Middle - earth, and there are some great character interactions that add depth to the story.
Yes, it could be. It's a very interesting and unique concept. Combining Harry Potter with the Riddler from Batman is quite unexpected. It might involve putting Harry Potter in a situation where he has to solve riddles like the Riddler creates, or perhaps there are elements of mystery from the Riddler's world incorporated into the magical world of Harry Potter.
One idea could be that the Avengers are somehow transported to the wizarding world. They might be initially confused by the magic but then start to work with the Hogwarts students and teachers to fight a common enemy, like a dark wizard who has also harnessed some sort of Muggle - like technology to become even more powerful. For example, Voldemort could team up with Hydra remnants to create a super - weapon that threatens both the magical and non - magical worlds.
A fun concept could be a Transylvanian wizard coming to Hogwarts as an exchange student. This wizard has a pet dragon that is different from the ones in the UK. He brings with him knowledge of Transylvanian magic, like how to use the power of the full moon in a different way than British wizards do, which intrigues Harry and his friends.