User blog comment:The Dragon Demands/Season 5 Trailer 2/@comment-5014364-20150310012035/@comment-5014364-20150310014957

Well yeah, by my timestamp I was referring to the dragon at the end.

...I do believe the guys in masks are the Sons of the Harpy (the insurgency from the old slaver-master class, conducting a shadow-war of ambush against Daenerys's forces in the streets and alleys of Meereen).