The Chameleon is poised to unleash unspeakable horror on New York City and Spider-Man is nowhere to be found, so the only person who can stop him is...Mary Jane Watson?!
Well of course. Mary Jane Watson, with her favorite bat. (I wonder if she named it Bruce?)
(Oh God, I just imagined that famous page from "Death in the Family" with MJ as the Joker and Chameleon as Jason Todd.)