FFG posted information on Skarn, the Lieutenant which will come when Manor of Ravens is released:
As someone who normally plays OL, I really like some of the plot cards that were revealed in this deck. In addition, Skarn's overall ability to regenerate is really going to piss of my heroes.
Further, his ability to drain their fatigue is pretty powerful as well, as many of my heroes actions/skills often cost fatigue.
I really think I am going to enjoy inflicting this Lieutenant/agent on my heroes.