The puppet master reveals himself is an article in Resident Evil Recollections. It was uploaded on 17 October 2016.
Leon has survived the onslaught of the villagers in Resident Evil 4, only to find himself before a robed man who tells him he is to "receive their power", shortly before having a subordinate inject him with something weird.
We won't know his real objectives until later, but the shot he just gave Leon will begin to take effect at the word of times.
This is turning out to be anything but a short mission...