4. This 1960s Batmobile Skin
It's going to be a generational thing, but to some the 1960's Adam West-fronted show with its "BANG!" and "WALLOP!" special effects is still the Batman experience. Sure the tone of this old show - where Bats beats a shark with some Bat Shark-Repellant and has a Bat-themed gadget for literally every scenario - is about as diametrically opposed to the Arkham tone as day is to night, but it'd be fantastic nonetheless. Throw in a next-gen Adam West skin and THAT theme song and you're onto a winner - it already has plenty excuses to pelt around the city in the Batmobile, why not scratch this nostalgic itch while you're on?