What would be natural here?

Bad guy:

The police can't do anything. They can't save you. No one can save you.

Good guy:

Yes, there is. Alex, he'll come and save us/he's coming to save us/he's going to save us. Just wait and see.

Hello, I can't figure out what would be natural in this context. There is so many different ways to phrase the sentence. What would to you be the natural thing to say in this context? Thank you.