Absolutely. Thor is a god in Marvel Comics. His divine heritage gives him extraordinary abilities and he plays a crucial role in many storylines, fighting against various villains and protecting the universe.
Another fanfiction idea could be a prequel to her role in Avengers: Endgame. It could show what she was doing in the cosmos just before she received the call to return to Earth. Maybe she was facing a different threat that was related to Thanos in some way, and this backstory could add more depth to her character in the movie.
One possible fanfiction could involve Spider - Man and Captain Marvel teaming up during the Endgame battle. Maybe Spider - Man uses his agility to distract the enemy while Captain Marvel blasts them with her powerful energy. They could also have some fun banter, like Spider - Man making a joke about how Captain Marvel can fly and he has to swing around.
The 'Thor: Ragnarok' storyline is also great. It delves into the end of Asgard and Thor's journey to save his people. It has a lot of character development for Thor, as he loses his hammer but discovers his true strength within himself. There are also many memorable side characters and epic battles against the forces of Hela.
Thor's age varies depending on different storylines and timelines in Marvel Comics. But generally, he's depicted as being very ancient, having lived for thousands of years.