OK, this is one of my commissions for the CGS Super Show that I took a few liberties with... OK, a LOT of liberties.
When I first got the request, i did not want to simply draw Batman in a Yellow Lantern Costume... what is the fun in that? So I decided, the Yellow Lanterns represent FEAR. What is the scariest interpretation of the Batman... simple... Kelly Jones's Batman (See Red Rain, etc). So I used that as my starting point, most specifically the looooong pointy ears.
Then I added the yellow bat symbol (which you got to have) and then made the rest of the costume black.
Then I did the teeth... to make it even scarier.
Then I F-ed up the eyes. I accidentally colored them in and whatever i did, either white out, acrylic paint or prisma color pencils, nothing worked... so I blacked them out entirely and it made it even scarier.
So there you go... Yellow Lantern Batman... ala, ME.