Kinda surprised I haven't see this topic yet. These are on pre-order at several sites. Joker and Harley in their main costume are apparently exclusive to the Funko unboxing and, for now, can be had pretty cheaply on ebay.
Unboxing.
https://www.youtube.com/watch?v=huHD_N7bWbESimilar to Game of Thrones, the head sculpts look good. We'll see how the actual product turns out.
If nothing else, it's more custom fodder.