Do not even contemplate self-publishing, even if doing so would stop literary agents fleeing in horror from the terrifying length of your beastly manuscript.
Do not quote things you require permission for.
Do not research copyright law.
In fact, don't do anything. Everyone stand very very still, and Genesis will bring us some ice for our heads.
Genesis: "I don't recall agreeing to - "
*GLARE*
Genesis: *grumble* "Fine, fine..."
Make it festively-shaped ice, for we are celebrating. My dear Guru, who dragged me into anime and convinced me that KH isn't just for kiddies, is having a baby and OMG it has features and a cute widdle face! The Choir is wildly excited, although Sephy seems to regard the whole thing as a fascinating science experiment and Genesis has been sulking about the reduced amount of attention he'll be getting once the dear little thing arrives.
If you'll excuse me, the ice has arrived, and we have to go distract ourselves before my estrogen levels get out of control and Angeal starts giving Zack that mpreg-can-be-fun look again.
Zack: "Seriously, Angeal, that's so not funny."
(It is funny.)