Square Enix has decided to streamline the fanart process, appealing directly to the community art website DeviantART with a The World Ends with You art contest. Entering the contest involves drawing new character or background art for The World Ends with You, to be judged by DeviantART staffers and the game's development team! We hope Square Enix gets the fanart they were imagining, and not the fanart that ... DeviantART is known for.
But the real story here isn't the proliferation of cat-eared Sephiroths in the style of The World Ends with You. As reference material for the contest, Square Enix put a bunch of concept art on the site, along with discussion of the game's visual style and inspiration from the team.