Ok, this one needs some explanation. I did this for a local comic book store who has a white lab mouse as a mascot. So I crossed the white mouse with the White Rabbit character from Batman and this is what I came up with.
A mouse/rabbit did what all those other villains couldn't do. Joker is kicking himself, saying "A mouse trap?! Is that all I needed?!" Nice work with the shiny silver and the black, and the pin-up pose.
Heh heh heh heh! Now this is something new and totally unexpected from you considering that you're a big Batman fan! I have to say that this is something pretty bold to poke some small fun at such an iconic character who has a large following but I also think that every now and then, it's good to poke fun at something in good jest.
I have to say that as a fan, it's been fun watching your style evolve over the years. You started out with this largely anime inspired style, and over time it became more subtle and influenced with a western touch to it, essentially becoming something of a hybrid style and it continues to amaze me what you can do with that style. I definitely love the coloring work which you have done here, and I definitely like the contrasting between the outfits of the two characters, and how we have one character wearing a protective black and another wearing a white revealing outfit. And the mouse trap around Batman is humorously well done!