Did this for the Steampunk Batman Remodel challenge [link]
over at the Whitechapel forums. Had a lot of fun designing all the different elements for this, from the Steampunk Batman and his steam-powered grapling gun to the mad scientist version of the Joker (the pose was grabbed from an old serial movie poster for The Lost City) to all the various text-based elements of the poster itself. Looked at a lot of awesome old serial movie posters for inspiration. Should probably do a print of this.