Sadly the number of things you do to shoot yourselves in the foot isn't shrinking.
The latest is casting the leads for the movie to be made from your book.
Now, in and of itself, this is a fun game.
I've played it myself.
The most fun is when you're playing with the folks who'd just optioned the book and will actually DO the casting.
But it's not harmless fun when you do it in a query.
What this tells me is you have unrealistic expectations. I'll do just about anything to avoid dealing with that.
Publishing beats the crap out of writers left right and sideways. I am often the bearer of very hard news: the book didn't sell, the advance is crap, your editor left to pursue a career in the circus.
And even when the book does sell, the advance is amazing, and the editor just signed a lifetime contract, there are still things that will (not may, WILL) go wrong.
If you add to that explaining:
*why your book isn't being picked up for film (most books aren't),
*why you aren't being consulted on casting (cause you don't know anything about how that works) *and not only is Idris Elba not the lead, they've just signed Carrot Top
then you understand why I don't just overlook this rookie mistake.
So, don't make this rookie mistake.
Make other ones.
**Idris Elba is perfect for anything.