Let's get together next week to flush out the details

Ok? I don't really understand el question but ok.

Change 'flush out' to 'flesh out'

Explanation:

Flesh out may sound weird if you've never heard of it before, but it's an actual word (phrase) ! Flesh out means to make an object fuller. In this scenario it would mean to basically get all the completed details. Flush out means to cause to leave a hiding place.