In many Fairy Tail fanfictions, the battle between Natsu and Acnologia is often depicted as extremely epic. Natsu's fiery determination and his unique dragon - slayer magic make for an interesting contrast against Acnologia's overwhelming power. Some fanfictions might have Natsu discover new forms or powers in order to stand a chance against the fearsome Acnologia.
In the Fairy Tail universe, Igneel is extremely powerful with his fire - based magic. However, Acnologia is known as the most powerful dragon. I think Acnologia would win. His power is on a different level and he has shown to be nearly invincible in most battles.
One epic moment could be when Igneel unleashes his most powerful fire attack, a huge blaze that engulfs the area, and Acnologia just withstands it with his dark aura. Another could be when Acnologia lunges at Igneel with his massive jaws, and Igneel dodges at the last second.
It depends on how the author of the fanfiction has developed the plot and the characters. They could have given Natsu some special power - up or a unique situation that makes him stronger than Gildarts. For example, the author might have introduced a new form for Natsu that gives him an edge in combat, or perhaps they've weakened Gildarts in some way for the sake of the story. However, in the original series, Gildarts is extremely powerful, so this is a significant departure in the fanfiction.
Some writers characterize Acnologia as a misunderstood loner. They show that his actions of destruction are a result of his past traumas. Others might make him more of a power - hungry villain who just wants to rule over all. There are also those who give him a sense of humor, which is a very different take from his usual brooding and menacing self in the original series.
There could be. However, it depends on how popular the concept of Naruto being Gildarts' brother is among fanfiction writers. Some concepts are more common than others in the fanfiction world. You may need to dig a bit deeper into the fanfiction communities or specific Naruto - Fairy Tail crossover sections to find it.
Well, adapting to Acnologia's body could be a complex process. They would have to learn how to control the raw power within it. This power might be overwhelming at first, and they could accidentally cause destruction. To adapt, they might start by testing their limits in isolated areas. Emotionally, they would also have to come to terms with the fact that they are now in the body of a feared being. They might try to use their memories of Fairy Tail to bring out the good in this new form, like using Acnologia's strength to protect the weak as they did in their previous life.
Well, it really depends on personal taste. Some might enjoy it because it combines two different fictional universes in an interesting way. If you like crossovers and are a fan of both Naruto and Fairy Tail (where Gildarts is from), it could be a great read.
Another theme is the exploration of new worlds. Sometimes Gildarts brings a new perspective on the Naruto world or vice versa. The fanfictions might take the characters on a journey to discover new places or understand different cultures within these fictional universes. This allows for a lot of creativity in terms of world - building and character interactions.