Nintendo Power seems to think so.
Nintendo Power magazine features a list of upcoming games each month, and August's list contains a new Fire Emblem title for the Nintendo DS.
Entitled Fire Emblem: Heroes of Light and Shadow, this previously unannounced game is likely a localized version of Japan's upcoming DS title Fire Emblem: Mystery of the Emblem - Hero of Light and Shadow.
Nintendo has yet to formally announce Fire Emblem: Heroes of Light and Shadow for North America, so no release information is currently available.