Another storyline might involve Elena getting trapped in a parallel dimension where only Elijah can reach her. They have to rely on each other to find a way back home. During this time, they learn more about each other's pasts and secrets, which deepens their bond.
One interesting storyline could be Elijah protecting Elena from a new and powerful enemy in Mystic Falls. Maybe an ancient vampire who has a vendetta against the doppelganger. He could use his centuries - old knowledge and skills to keep her safe while also trying to understand his growing feelings for her.
One interesting storyline could be Elijah protecting Elena from other powerful vampires. Since Elijah has a sense of honor, he might see it as his duty to keep her safe.
A fanfiction could explore the idea that Elijah's desire for Elena is part of a bigger prophecy. Maybe there's a hidden message that says if Elijah and Elena are together, it will bring peace to the vampire and human world. So he's driven by this sense of duty as well as his personal feelings for her. This would lead to a lot of internal conflict for Elijah as he tries to balance his feelings with the potential consequences of their relationship.
One idea could be that Elijah tries to court Elena in a very old - fashioned and gentlemanly way. He might take her on trips to historical places he has known over the centuries, sharing his stories and knowledge with her. This would be a contrast to the other vampires' more aggressive approaches towards Elena.
One common antagonist could be Klaus. He has his own motives and often clashes with Elijah. His presence can create a lot of tension between Elijah and Elena as well, since he might target Elena to get to Elijah or vice versa.
One popular storyline is Damon and Elena's adventures in the afterlife. It explores what could happen to their relationship beyond death. Another is their time - traveling escapades, where they might go back to key moments in the Vampire Diaries timeline and change things. And then there are the stories where they face new, powerful enemies together, strengthening their bond in the process.
One popular storyline could be Elena dealing with the challenges of being pregnant while still being in the middle of the vampire - werewolf drama. For example, she might have to hide her pregnancy from some of the more dangerous vampires who could use it against her or her loved ones. Another could be exploring how her pregnancy affects her relationships. Maybe Damon is overly protective, which causes tension with Stefan who believes she should be able to make her own choices. There are also fanfictions that might focus on the supernatural aspects of the baby, like if it has special powers that start to show even before it's born.
One interesting fanfiction could be about Elijah trying to redeem Katherine. Maybe he sees a side of her that others don't, and he attempts to guide her towards a more positive path. It could involve them traveling together and facing various challenges from the vampire world.
One possible plot could be that it's a magical or unforeseen situation that leads to their pregnancy. Maybe a powerful witch casts a spell that binds their fates in this way. They then have to deal with the reactions of the other characters, like Damon and Klaus. Elijah, being an original vampire, would be worried about how this new situation affects his status and power, while Elena would be thinking about how it changes her life in Mystic Falls and her relationships with her friends.
In some fanfictions, there could be a plot where Rebekah and Elena become friends because of their shared experiences with the Salvatore brothers. They might bond over the fact that they both have complex relationships with Stefan and Damon. Rebekah could give Elena some insights into the vampire world from an original vampire's perspective, which Elena finds useful in her own journey.
One interesting fanfiction could be where Elena and Damon go on a journey to find a hidden vampire realm. In this story, they face numerous challenges together and their relationship deepens as they rely on each other for survival. It's full of adventure and romantic moments.