pre-pro Novice producer has compensation question (A-List actor project)

Sounds like so many variables I won't be privy to in order to make a good % of producer profit deal. My appreciation is genuine and I'm happy to have chatted with you great folks! btw: I queried agents/managers before I got in with these cats. That's when I heard only crickets Lol Note; these cats all have integrity--never been a question of that; rather moreso ignorance of the biz on my part Thanks again!