The biggest mistake in pitch bibles
The biggest mistake I think anyone can make in a pitch bible is a wall of text. People won’t read it. It takes up too much time. Unless your text is pure gold, it’s like wading through a swamp. And if it is pure gold, will people have the time to find that out?
More often than not, very busy people are scanning through pitch bibles. So you need to get to the point and keep it lean.
And yet, if you strip it down to the bare minimum, you always run the risk that someone will flick through it and think, this feels a little thin. Is it underdeveloped? Not a fully-realised concept?
So how do you keep it lean and to the point while making clear that your concept has depth, storytelling potential and a fun character dynamic? Active images. Try to get every picture telling a story. If it is simply a single character illustration, tell us who they are in their pose and expression. If it is a setup made to look like a still from an episode (I would always recommend this), make sure it feels mid-story, mid-action. That way it gets people thinking about how the characters got there or what will happen next. An image alone can get the message across that there are stories to be told.
Even if you are showing off a particular aspect, try to tell a story. Showing off your fancy backgrounds? Maybe show a character playing in your fancy backgrounds. Keep it active. Inspire the imagination so that, even if someone doesn’t read one word in your bible, they have a good idea what it is about. And hopefully, they’ll be making up their own stories as they look at your pictures.