even though it is a long shot, I would still encourage you to send your scripts in to both Obsidian and Lucas Arts. what I read was really encouraging and sounded like you were going in the right direction.
chances are, there is no money to be made here, even if they do use some or all of your ideas...but if your motivation is to see K3 get made and have a satisfying story, by all means, send some snail mail....it can't hurt.
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you never know what they may like