It could be a rogue ninja who has mastered a forbidden jutsu during the time skip. This ninja might have been a former ally or a student from one of the ninja academies who turned to the dark side. His goal could be to take over all the ninja villages using the power of the forbidden jutsu.
One idea could be exploring how Naruto has mastered new jutsu during the time skip. For example, he might have developed a unique combination of his Rasengan and Sage Mode techniques. Another plot could focus on the relationships that have changed. Maybe Sakura has become a more independent and powerful kunoichi, and there are new tensions or reconciliations within Team 7.
Well, 'Naruto: Post - Time Skip Ascension' is also worth checking out. It focuses on Naruto's rise to power during the time skip. The author does an amazing job of exploring his newfound abilities and how they impact his place in the Hidden Leaf Village. There are also some great sub - plots involving other characters in the village that add more depth to the story.
The time skip in Naruto is a period full of mystery and potential for growth. Fanfictions about it are popular because they can explore what the characters were doing during that time. Writers can give Naruto and other characters new abilities, relationships, and storylines that the original might not have covered.
One great Naruto time - skip fanfic is 'The New Era of Shinobi'. It focuses on how the characters have developed during the time skip and brings in some interesting new plotlines related to the changing shinobi world. Another is 'After the Skip: Naruto's Ascent' which shows Naruto's growth in power and leadership skills in a very engaging way.
Well, a cool concept in Naruto time skip ability fanfiction is the enhancement of existing abilities. Like Sakura could have mastered a new level of her strength - perhaps she can now use her medical ninjutsu to heal on a much larger scale or even bring people back from the brink of death more easily. And then there's the idea of new alliances. Characters who were once enemies might form unexpected alliances during the time skip, which could lead to all sorts of new storylines. For instance, some of the minor villainous clans could team up with the Leaf Village for a common goal.
Naruto could gain the ability to fly on a magical creature. Since Fairy Tail has many flying creatures, he could bond with one and use it to travel. This would be a new form of mobility for him compared to just running or using his ninja skills for transportation. Also, he could learn some kind of transformation magic that is different from his own shadow clone or Sage Mode transformations.
Naruto becomes more confident. After the time - skip and toad training, he knows he has the skills to face tough opponents. He's no longer the underdog who doubts himself all the time. His appearance might also change slightly to reflect his growth. Maybe he has a more serious look in his eyes. His sense of humor could still be there, but it's more refined, not as brash as before.
I'm not entirely sure what specific'syumbls' (assuming you mean symbols) are meant for a time - skip story. It could potentially be things like a clock symbol with a fast - forward arrow to represent the passage of time quickly. Or perhaps a set of ellipses (...) to indicate a gap in time.