The two battlesuits previously appeared in F.E.A.R and F.E.A.R. 2: Project Origin, and the EPA was in fact pilotable in F.E.A.R. 2, but the trailer they've sent out implies a lot more mobility on their part this time around, making their existence part of what I see as a kind of renewal in Starship Troopers type power armor, where the «power» component to their power armor wasn't just a
heavier load of armor and munitions, but also thrusters which allowed a single infantryman to
move quickly
across miles of territory.