Well, perhaps Bilbo is fed up with Gandalf constantly pulling him into dangerous adventures. Maybe Gandalf made a decision without consulting Bilbo first, like bringing the dwarves to Bilbo's house unannounced. So Bilbo decides to tell Gandalf off for not respecting his privacy and putting his life in jeopardy so often.
The target audience could be fans of 'The Hobbit' and 'The Lord of the Rings' who like to see different character dynamics. People who enjoy seeing the more feisty side of Bilbo might be interested.
If Harry Potter meets Gandalf in fanfiction, it might be a situation where they team up to fight a common enemy. Gandalf's experience in dealing with dark forces like Sauron could give Harry some great strategies to deal with Voldemort. They could combine their powers, like Harry's Patronus charm and Gandalf's light magic, to drive away the darkness.
In this fanfiction, Bilbo and the Goblin King are the central figures. Bilbo, with his simple yet brave nature, is the focus of the story as he faces the Goblin King. However, we might also see the goblin minions as important characters in a way. They are part of the Goblin King's domain and can either help or hinder Bilbo's encounter with their king. Their actions and reactions can add more depth to the story, for example, if some of them start to respect Bilbo for his courage, it can create an interesting dynamic within the goblin community.
In this fanfiction, Bilbo might outwit the Goblin King with his wits. He could use his cleverness to escape from the goblin's clutches, like he did in the original story with Gollum. Maybe he finds a magical item in the goblin king's lair that helps him on his journey.
I'm not sure which specific story Gandalf is telling as there are many in the Tolkien's works. Maybe it's about the history of Middle - earth, like the battles against the dark forces or the tales of the rings.
It's hard to say. Gandalf has a lot of raw power and experience. He's faced some really tough foes in Middle - earth. But Harry Potter is no slouch either. He's got his own set of powerful spells and the ability to think on his feet. However, I think Gandalf might have the edge. His magic is more of an all - encompassing force, and he's had centuries to master it.
Another concept is that Naruto is sent to Middle - earth. There, he could use his ninja skills and chakra powers. He and Gandalf could team up to fight Sauron. Naruto's ability to make friends and inspire others would be really useful in uniting the different races of Middle - earth against the common enemy.
Well, Gandalf is from the Ainur. He was among those Maiar who were sent to Middle - earth. His purpose was mainly to help the good against the forces of evil like Sauron. He was created long before the events in Middle - earth started to unfold. Gandalf's origin story is deeply intertwined with the greater cosmology of Tolkien's world. He had powers that were both magical and related to his wisdom and knowledge, which he used to influence the course of events in Middle - earth.