He could meet Native American tribes. Elrond would be intrigued by their unique cultures and spiritual beliefs. He might exchange knowledge with them, like sharing elven tales in return for learning about their hunting techniques.
There's a good chance he'd meet American inventors. Picture Elrond meeting Thomas Edison. He could offer his insights on how to make Edison's inventions more sustainable or efficient, using elven knowledge of energy and materials.
Elrond might also meet famous American politicians. For example, he could run into Abraham Lincoln. Elrond could use his diplomatic skills to offer advice on how to better handle the issues of the Civil War, perhaps suggesting more inclusive solutions to reunite the nation.
If Elrond travels back to the First Age, he could meet Fëanor. This would be a very interesting encounter as Fëanor was a great and complex figure. Their meeting could lead to a clash of ideas, as Fëanor was often headstrong and Elrond is known for his calm wisdom.
One possible plot could be Elrond traveling to different eras in America. He might end up in the colonial era and witness the struggles of the early settlers. Maybe he uses his elven knowledge to help them with things like medicine or building more efficient shelters.
He could meet Peggy Carter. Since he had a strong connection with her in the past, it would be a very emotional reunion. They might share some unspoken feelings that were left unexpressed before.
One idea could be that Elrond travels back in time to the First Age to prevent a great tragedy. He uses his knowledge and wisdom from the Third Age to change the course of events. Maybe he stops a powerful weapon from being created that would later cause destruction.
He could meet his future descendants. Maybe a great - grandson who has inherited some of his speed but also has unique abilities of the future.
He could meet American witches and wizards. Maybe a friendly wizard who shows him around the American wizarding areas.
They could meet new magical students at Ilvermorny. For example, a young and talented witch or wizard who is curious about their experiences at Hogwarts.
In this fanfiction scenario, Goku could meet Bulma when she was a child. He could befriend her in a different way compared to their first meeting in the original story. Also, he could run into King Kai at an earlier time and start training with him much sooner, which would significantly boost his power levels and change the course of his battles in the future.
He might meet American wizards who are very different from his British friends. Maybe some tough - talking Aurors who have their own way of dealing with dark magic.
He could meet his younger self, Anakin Skywalker. That would be a really interesting encounter. He might also meet Qui - Gon Jinn, who could sense the conflict within him. And there's a chance he'd cross paths with Yoda in his prime, which would lead to some intense confrontations or perhaps even unexpected alliances.