Alright ladies and gents, listen up.
Many of you have probably noticed that I haven't been posting any ideas as of late. The reason for this is simple; I've taken to hanging out on Animesuki's Nanoha boards, and all my ideas are better off being posted there than here (where nobody pays attention to my ideas these days anyways).
Less than half an hour ago, I was challenged on the Original Character thread's IRC channel, #outercadia, by one of the locals. TK3997 challenged my latest idea, a Nanoha/Kingdom Hearts fusion, saying that the importing of the Heartless and the concepts of Light and Darkness was a stupid idea. When I argued with him, he proceeded to call me out and challenged me to prove him wrong.
Which is where you lot come in.
The challenge is thus: to import the Heartless into a foreign universe, namely the Nanohaverse, holding by and large to the rules which exist in that universe. The best lead I have thus far is connecting Light to a concept attributed to the Saint Church, namely making the Sankt Kaiser into an embodiment of that force.
The heartless, for those who are unfamiliar with Kingdom Hearts, are the embodiments of the power of Darkness, a malevolent force which exists in a realm parallel to our own universe. In Nanoha, this might translate into Light being the multiverse as we know it and Darkness being a negative reflection, literally the shadow of the multiverse. Deep within this negative reflection lies either Kingdom Hearts or Al Hazard depending on which series you're paying attention to.
Other ideas include existence vs anti-existence, with the heartless being the results of an experiment with some kind of void magic, and spiritual energy vs lack of spiritual energy.
I'm busy trying to think up ideas of my own and figure out ways to fit them in, but I'd also like to get ideas from the local gang. You lot have been a great help to me in the past, and I hope you'll help me again now, when I've got something to prove.