Oh, dear, I hadn't meant to be obscure or to disapprove.
By fandom, I mean the actual comic title, or movie title, or cartoon title. For example, the comic title "The Justice League" would be a fandom. Think in terms of the categories listed under each subcategory in Comics. "Batman" is both a fandom and a character, but as long as you don't limit it to the character, it covers the entire Batman setting, canon, and other characters that Batman would interact with, such as Robin, or Alfred. Jean Grey is part of the Xmen, so disclaiming ownership of Xmen covers, once again, all of the characters, settings and canon for that 'verse.
So, a good disclaimer might read, for example: "I do not own Xmen, The Justice League, Batman, Superman, or The Avengers, and I make no profit."
I hope this is less confusing.