Eric Draven versus TDK Joker.....
Eric Draven, while avenging the the murder of his Bride to be and himself, runs across the Joker, and assumes the Joker had a hand in it.
The Joker, seeing another painted face freak laughing like a madman, decides to show Draven there is room for only one of his kind in Gotham city.
They are both armed with two knives, and are as they were at full strength in their respective movies.
The Joker has no idea who Draven is, or where he draws his power from, and vice versa, Draven has never heard of the Joker.