It was between Catwoman, Poison Ivy, and Harley Quinn for me. And Thank You Beth for being very kind & offering encouragement on doing Catwoman after your awesome Catwoman work :) (not to forget, Spiderman -for a bit- kicked Superman's butt, so Catwoman could arguably do the same :D ). I was guessing that Catwoman and Harley Quinn both have a similar type of build, and I thought it might be fitting for Harley Quinn doing the 'silly hands/ears' on the Bat signal, so I went with Harley Quinn.
( and the insanely huge original sized version )
*it's ~ 5 MB file size :)