A third plot idea might be that Naruto is somehow transported to a different dimension where the rules for summoning are completely different. Here, the legendary summons are not as friendly as in his world. He has to find a way to earn their trust and form new bonds in order to get back to his own dimension.
Another plot could revolve around the relationships between the existing legendary summons. Maybe there's a power struggle among them, and Naruto has to step in and mediate. He could learn about their ancient rivalries and use his skills to bring them together to face a common foe like a powerful, ancient evil that has been awakened.
One idea could be a young Naruto discovers an ancient scroll that allows him to summon dragons instead of toads. He then has to train with these dragons to master new jutsus. Another could be that the dragon summons are from a different dimension and bring with them a new type of chakra that Naruto has to learn to control.
One idea could be Naruto discovers a new summon that has a special connection to lemons. Maybe the summon can use lemon - scented jutsu or has a power that is enhanced by lemons. Another could be Naruto's summons get into a comical situation involving lemons, like a race to find the biggest lemon in the forest.
The Snakes, especially those related to Orochimaru's summons, are often used in fanfiction. They can bring an element of mystery and danger. Some fanfictions might explore the idea of a redeemed snake summon that helps Naruto in his quests, or a more powerful, ancient snake that was hidden away until now.
One idea could be a story where Naruto discovers a hidden samurai clan and has to learn their ways to defeat a new powerful enemy. Maybe he has to master their unique sword techniques.
One idea could be a story where Naruto discovers a hidden ancient jutsu that changes the power balance in the ninja world. He has to learn to master it without being corrupted by its power.
Well, sometimes in 'naruto different summons fanfiction', Naruto could summon intelligent and talking animals that are not part of the normal summoning repertoire. Like a magical deer that can communicate and has the power of healing. This would add a whole new dynamic to his adventures and interactions with other characters. Also, he might summon a giant sea monster that can control water in ways that no one has seen before.
Well, you could write a fanfiction where Hercules loses his strength for a while. He then has to rely on his friends and his own inner courage more than ever. This could lead to some great character development for him. Or perhaps a story about Hercules mentoring a young hero, passing on his wisdom and skills. It would be interesting to explore how he teaches and what kind of relationship they develop.
Beetle summons in Naruto fanfiction could also possess the ability to manipulate earth. Their strong exoskeletons could be related to an affinity for earth - based jutsu, allowing them to tunnel through the ground quickly and emerge unexpectedly during combat.
Perhaps in the fanfiction, the Akatsuki organization somehow gets hold of the power to summon Final Fantasy creatures. Naruto then has to figure out how they got this power and stop them. He might have to train hard to master the same summoning techniques. He could end up summoning a Shiva to counter the Akatsuki's Ifrit summon in a huge battle that shakes the very foundations of the ninja world.
A plot idea could be that Naruto discovers a new, ancient form of chakra that has been lost for centuries. He then has to train to master this chakra while also dealing with the political implications within the Hidden Leaf Village. Some elders might be against him exploring this new power for fear of the unknown, but Naruto, being Naruto, is determined to master it for the good of the village.