Some of the Leica Q accessories are already in stock at various retailers:
Leica BP-DC 12 Lithium-Ion Battery (19500) – the battery is identical to the much cheaper Panasonic DMW-BLC12 version (both are 7.2V, 1200mAh)
Black leather Leica holster case for Leica Q camera (19503)
Leica ever-ready case for Leica Q – black leather (19502)
Leica ball and socket head (14109) with Leica tabletop tripod (14100)