I don't understand the sentence, "someone be someday". How could a person can be something related to date?
Native speaker’s answer
Rebecca
To fully understand this sentence, you'll need to take a closer look at the previous sentence. In the previous sentence, she asks, "Someday, could we be something extraordinary?". Therefore the following sentence is their answer to the question. So the sentence would be "We're gonna be something extraordinary someday", but it has been abbreviated because it was already said before. Here's a similar example. Ex: A: I want to be a doctor! B: If you try hard, you will be one day.