One common theme could be power. Since 'catching the thunder' can be seen as obtaining a great power. Characters in the fanfic might be striving to gain this power for various reasons, like to save their world or to prove themselves.
Another theme is probably adventure. The idea of 'catching the thunder' implies a journey, a quest of some sort. So, there would be elements of exploration, facing unknown challenges, and overcoming obstacles along the way in the fanfic.
In 'a crack of thunder fanfic', the theme of omen or prophecy can be seen. The crack of thunder might be seen as an omen of something big to come. It could be a prophecy about a character's destiny, like they are destined to do something great or face a great danger when they hear the thunder. Also, the theme of power is there. The thunder could be associated with a powerful force, either that the characters need to harness or that they need to fight against.
I'm not sure which specific 'catch the thunder fanfic' is really good. You can try searching on some popular fanfic websites like Archive of Our Own. There are often many different fanfics with various themes and styles, and you might be able to find some interesting ones related to 'catch the thunder' there.
Themes of fate and destiny might be common in 'a crack of thunder fanfiction'. The crack of thunder could be seen as a sign from the universe, a moment that sets the characters on a particular path of fate. It could also be about characters trying to defy their fate that is somehow related to this thunderous event. Additionally, themes of discovery are likely. The thunder could be the starting point for characters to discover something new about themselves, their world, or the secrets it holds.
A major theme in these fanfictions is the alteration of the existing power structure in the Naruto universe. With Naruto controlling thunder, he challenges the traditional elemental power hierarchy. This can lead to both admiration and envy from other characters. Additionally, the fanfictions may explore how Naruto uses his new power for the greater good, such as protecting the Hidden Leaf from new and powerful threats that are vulnerable to thunder - based attacks.
The theme of growth and development also appears often. The baby's exposure to Celtic Thunder's music can lead to personal growth, like learning new things, becoming more confident or developing a unique personality trait. The music becomes a catalyst for the baby's development in these stories.
Power and magic are common themes. The ancient thunder dragon spell would likely represent a very powerful form of magic. Another theme could be adventure, as characters might go on quests to discover or master these spells.
Power and control. Since the three - headed thunder dragon is a very powerful creature, many fanfictions explore how it uses or struggles with its power. For example, it might have to learn to control its thunder - based abilities.
A major theme in 'Power Rangers Dino Thunder Crossover Fanfiction' is also the idea of alternate universes or timelines. This allows for really creative storytelling where the Dino Thunder Rangers can meet versions of themselves or other Rangers that are different due to the different circumstances in their respective universes or timelines. It makes for some really interesting character interactions and plot twists.
Another theme might be the struggle with their identities within the Teen Titans group. They could be dealing with how their relationship affects their role in the team and how they are perceived by their fellow Titans. This could involve themes of acceptance or secrecy. Often in yaoi fanfiction, there's also a strong theme of emotional connection and the development of a deep bond between the two characters, which might be shown through their shared experiences and how they support each other.
One common theme is the crossover of powers. For example, Naruto characters might gain the ability to morph like the Power Rangers Dino Thunder, or vice versa. It's really interesting to see how the different power systems interact.