Ok this might sound really stupid but I was really excited about it when I thought of it

Need some advice everyone, after Andy's questions about who would play each character in Strange and Norrell, I thought a really cool story idea would be to pretty much be a screenwriter for the film and write about what stays and what goes. I thought it would be really fun and interesting, but I'm interested to hear what you all think, because I'll need to go back to the drawing board if it turns out I'm an idiot.