Layout “pencils” and finished artwork, drawn directly overtop. The original plot called for Stephanie Brown to be Batgirl, but production delays and the DC 52 reboot caused an editorial decision to change to Spoiler. Layouts were drawn featuring the Spoiler costume but by the time final artwork was underway, the decision was made to revert to Batgirl. (Artwork from Batman Incorporated: Leviathan Strikes, 2011)
Adam might wanna see this.