iconuk01:

Sigh… I might have known…. these are the disco variant minifigures based on the musical number at the end of The LEGO Batman Movie. (as well as the briefly seen Nightwing outfit Dick briefly tries on)

So of course, the ONLY way to get them is to buy the new Joker Manor set which is retailing at $270 US….. sigh..

oh my goodness!