It’s just a little to on-the-nose for me. I would prefer if it went something like
“This is a rebellion, isn’t it? That’s what I’m doing.”
or something, anything else. I don’t think the delivery of the line is done very well, either.
Fair enough, but she’s not doing a “rebellion”, she Rebels, which becomes just “rebel” when you put “I” in front of it. But, yes, it is a bit Hollywood, and the dramatic trailer music makes it seem a bit too much, but I’d hardly use it to suggest a bad story/script.