One of the best things about Elseworlds books is that the creators get to tweek the characters we know and love and often the results are a lot of fun.
5. Batman: In Darkest Night
Ever wonder what would happen if Abin Sur appeared before Bruce Wayne instead of Hal Jordan? An awkward cape and (Green Lantern mask-infused) cowl/Green Lantern uniform mash-up for starters.
4. Batman: Holy Terror
In a world where the American Revolution failed and America remained a British colony, Bruce Wayne is an ordained minster by day, and a 90s-ified scourge of evil and oppressive British rule by night.
3. Batman: Master of the Future & Batman: Gotham By Gaslight
In both the original (Gotham By Gaslight) and the sequel (Master of the Future), a turn of the century Batman is looking badass with his high-collared cape, knee high boots and double knife belt.
2. Superman: Red Son
Hey Comrade, the crazed anarchist Batman who fights against the brutal Soviet regime led by Stalin and his "son" Superman features the best character design in the book. I think it all comes down to the hat/cowl, which is so simple, yet so brilliant.
1. JSA: The Liberty Files
In this World War II (and beyond) epic that casts the familiar faces of the Justic Society (plus Batman) as covert government spies, Batman (here codenamed The Bat) goes through many costume changes depending on the kind of mission he's on and all of them are inspired, design-wise.