Alright! I can't wait to read your stories! I'm writing my own fanfic as well! Actually two. One for ShinRan pairing and the other one is AiCon pairing.
Hmm... Write out his life and his tragedy and how and why he is important to the ending. The family tragedy is three years after he started out? Then I think you should start from the tragedy, not from the beginning. The story on kid kloak will be too long if you start from the beginning.
Oooh. You got to write about Kid Kloak firstly, explain about him and how important he is to your version of the ending. Then, you can write how the ending would be by saying it's a sequel to your kid kloak story.