Kind of slow with this but anyway…
Durarara!! is based off the series of light novels of the same name by Ryougo Narita known mainly for his other series of light novels, Baccano!. It’s also being produced by Brains Base who animated the anime adaptation to Baccano! and the second season of Spice and Wolf. So that explains Isaac and Miria on the screen in the square and the cutout of Horo.
So this begins airing in January.
Synopsis from MAL:
The story takes place in Ikebukuro, Tokyo. Where teenage punks gang up and fight each other. The gangsters are afraid of an urban legend, the “Dullahan” a headless rider, who rides a black motorcycle without headlights nor the sound of an engine. Mikado Ryuugamine is a normal high school boy who seeks peculiar beings. When he moves in to Ikebukuro, a mad race for Dullahan’s missing head breaks out.