Oooo-key. Here's a difficult little subject, and I am one of the people who can give first hand account of how difficult it is. Very.
I have spent litrally hundreds of ours and reams of paper in coorospondence with JHC, Disney, etc, and the only replies I ever get are "Unless you have an agent we cannot read your work."
And from the agents: "This material is not mainstream, therefore we will not look at it."
I would say Go Ahead, start sending letters, treatments, ideas, etc, and don't stop sending until they lock you up. But, don't hope for success.
Keep believing, keep pretending...