Since you asked for scenes from The 5th's Long Week that we'd like to see in your re-imagining, one chapter does stick out in my memory. Remember when Sakura eventually finds out about the arrangement and gets angry at Tsunade? Tsunade then gets tied to a tree and Sakura spends the night yanking out her pubic hairs one by one, leaving her ex-mentor a sweat-drenched, exhausted mess by sunrise. There was also something to do with chakra in that segment, but I can't remember the details. Anyway, kind of a unique scene, was hoping you were planning to incorporate a version of it in your story.
Good luck with this one either way. Looks like you're off to a great start.