"I heard 'The Bat' got him."
"The Bat!?! Aw man, gimmie a break willya?!"
I'm honestly surprised this hasn't been released in an official capacity. It would be easy for LEGO to do, and it would be a nice change of pace from the standard Batman minifigure that gets released with every set.
Oh well...I made my own!
I simply borrowed a pair of wing-arms from the Series 8 Vampire Bat (of which I have a handful because I just LOVE him!) and swapped them out for Batman's normal arms. It obviously only works for the black-suited Batman minifigure, but it's perfectly in tune with the Burton and Nolan representations of Batman, whose cape can be flapped open into wings. As opposed to the rigid bat wings/flight pack that came with the Catwoman Chase set, which is more in tune with The Brave and The Bold version of Batman.