Well they have just shown the wall latching system in the game today. You wont be able to sit there latched indefinitely by default, but Brent mentioned loadout items that would make you capable of sitting latched onto a wall indefinitely. Really eager to see the Night Lord players utilize this and seeing it in a coordinated action.
Like the great cats of Terra say "If I fits, I sits" Also on a side note, Im thinking of creating my own little side Group for my NL Army, "The Lords of Arkhona" Just need an idea that sets them apart from the rest?