Got it just under the wire! For North America, anyway! Nya-ha!
Y'know, back when I was but a wee fanboy, I actually used to wonder if there was any feasible way the JLA could go up against Two-Face. It seems far-fetched to say the least, but I suppose the Joker's done it several times. So imagine my delight when, a couple months ago, I discovered this story existed!

In this two-part JLA story from 1975, our favorite bisected anti-villain teams up with the JLA to save the world from aliens inhabiting statues of Julius Caesar, Ben Franklin, and Napoleon! No, really.
( God, I love the Silver Age )Some of the most interesting superhero stories occur when characters are taken out of their usual circles. Like, Ra's al Ghul being revealed as the big bad guy in a LEGION OF SUPERHEROES story! Or EMPEROR JOKER! It's a simple, engaging, and underused trope of comics. They're the kind of stories that require a bit of imagination and originality on the writer's part, which is probably why they're not done that often.
Me, I'd love to see more of characters like Two-Face being used outside of Gotham, pitted against characters who aren't part of the Bat-Family. We already got a taste of the possibilities between this and
the TEEN TITANS SPOTLIGHT issue where he faced off against Cyborg. For one thing, I'm hoping that JMS actually does
the Two-Face/Hawk&Dove issue of THE BRAVE AND THE BOLD that he talked about back in May 2008. That'd be a great start.