As we all know, this is a forum for Kingdom Hearts. Even so, if anybody posts spoilers for Endgame anywhere on this site without spoiler tags, you will be banned.
If you change your avatar to something related to Endgame, you will be banned.
If you put something in your signature, send a message to somebody that is visibly seen, or share spoilers with somebody who does not wish to see them, you will be banned.
Uh, even if this was in the Battles section of the forum, it still isn't a place for hypothetical, abstracted battles between established characters. It's about members picking up and writing characters step-by-step as they go through a battle, prose style. Maybe you're looking for something that belongs more in the Forum Games section, if it's a "Character X versus Character Y" thing you're looking for.