The 'Agent of Asgard' fanfic is quite an interesting piece of work. It often delves into the character's journey in a unique way. The fanfic might explore the powers and responsibilities of the Agent of Asgard in more depth than the original source. It could also introduce new storylines and relationships that add a fresh perspective to the whole concept.
The duration of the Asgard story arc is hard to pinpoint exactly. It could range from a few chapters in a comic series to a significant portion of a TV season. Different interpretations and storylines can influence the length significantly.
One possible story could be about how this Avenger, as the Princess of Asgard, uses her Asgardian powers and knowledge to help the Avengers in a battle against a powerful new enemy. For example, she might be able to call upon the Bifrost to quickly transport the team to different locations during the fight.
There probably is. Fanfiction is a world full of wild and creative ideas. The idea of Harry Potter being the son of Asgard could be a really interesting take on the character. However, it might not be a very common theme, so you may need to dig a bit deeper. Try using different search terms related to it, like 'Harry Potter Asgardian heritage' in addition to the main phrase when looking for it.
The 'gods of asgard graphic novel' probably focuses on the gods in Asgard. It could include their powers, for example, Thor's strength and ability to control thunder. It might also cover the different realms they interact with and the various creatures in their world.
He'd probably start by observing. Naruto is curious, so he'd watch how the Asgardians live, their customs, and how they interact. Then he'd start to adapt by using his ninja adaptability skills.