10. Batman Unlimited
While the Batman Unlimited franchise was more well-known for both its animated movies and the toyline it inspired, it technically gifted us with an animated series too. A webseries, to be exact, which released new shorts on YouTube each week.
This franchise was known for its outlandish gadgets and suits as those inspired the toys, but Batman did wear his standard Batsuit quite regularly, so we're going to go with that one. It was a regular presence in the movies, and it also recurred throughout the series.
A more kid-friendly franchise, it went back to the classic look of the blue and grey, but made some modern adjustments. The cowl and cape were a much deeper shade of blue than the vintage cartoons, while the bodysuit was a much lighter grey. Everything about it was sharper, too, with more pointed ears and gauntlets and a much spikier, funkier bat symbol on both the chest and utility belt. We also can't ignore the more armored cowl and the chinstrap that looks like it belongs on The Flash's cowl more-so than Batman's. But hey, Bats makes it work.
It's an unusual look, but one that works for the universe in which it exists in. And again, it's super funky (and a tad underappreciated, honestly).