In this fanfiction, a possible plot point is that the goblins help Harry in a way that challenges the traditional wizarding world's rules. For example, they might introduce him to a different kind of magic that the wizards have long forgotten. Also, the goblins could have their own motives for helping Harry, like seeking a change in their status within the magical community. This creates an interesting dynamic as Harry has to navigate between his own goals and the goblins' interests.
They could offer him information. Goblins often have a deep knowledge of the magical world's history and secrets, which might be crucial for Harry's journey. For example, they might know about some hidden enemies or undiscovered spells. They could also give him advice on how to deal with certain magical creatures or situations that he is unfamiliar with.
One interesting plot point could be how Snape first decides to help Harry. Maybe it's because he sees a glimmer of Lily in Harry, or perhaps there's a new threat that forces him to put aside his grudges. Another could be the way Harry reacts to Snape's help. At first, he might be very suspicious since they have a rocky history in the original story.
Harry Potter is the key character as the title implies he is the one getting help. The goblins play a major role too. There could be a goblin leader, perhaps an old and wise one. Hermione and Ron may make appearances, but mainly it's about Harry's interaction with the goblins. There might also be some side characters from the goblin community, like young goblin apprentices who help Harry in unexpected ways.
Well, in some 'harry against the goblins fanfiction', an interesting plot point could be Harry's discovery of a secret goblin conspiracy against Hogwarts. This could lead to him having to use his unique magic skills to outwit the goblins.
One interesting plot point could be Harry helping the goblins in a rebellion against the wizarding world's unfair treatment of them. Another could be him learning goblin - made magic that is different from what he learned at Hogwarts. Maybe he discovers a hidden goblin treasure that has a powerful magical item and has to protect it from dark wizards.
There could be a goblin named Griphook. In the original series, Griphook has some interactions with Harry, and in the fanfiction, he might play a more significant role in helping Harry.
One interesting plot could be a goblin rebellion against the wizarding world's control over their banks. They might use their knowledge of magic and hidden tunnels to stage a takeover.
One interesting aspect in some fanfiction is the goblin society. They may have complex hierarchies and cultural traditions. There could be goblin characters who are rebels against the traditional goblin - wizard relationship, seeking more equality or even trying to take over wizarding institutions.
One interesting plotline could be Harry getting help from a secret magical society that has been hidden from the wizarding world. This society might have unique spells and knowledge that they share with Harry to defeat Voldemort.
A really exciting plot could be that there is a prophecy that involves both Harry Potter and the goblins. The goblins have their own ancient prophecies that seem to connect with the ones about Harry. They have to work together to figure out what the prophecies mean and prevent a great disaster from befalling the wizarding world. This would involve a lot of research into old goblin and wizard lore, and they would have to travel to different magical places to find the missing pieces of the puzzle.