We've already seen the first signs that an Android 4.4.1 is already in the works, but we now have additional information that seems to indicate that Google is working on it...
Source: http://www.phonearena.com/news/Google-may-be-working-on-an-Android-4.4.1-KitKat-already_id49129
Source: http://www.phonearena.com/news/Google-may-be-working-on-an-Android-4.4.1-KitKat-already_id49129