Did I butcher a quest line?
I talked to Navlaan while human, didn't get much out of it. I only just found out I had to be hollow. Went on to pull the lever at the end of the level and fight the dragon. Apparently he's set off free now and ready to invade me. I was hoping to buy stuff from him. I haven't had the chance to go back to the fog gate yet to see if he's there. Did I ruin it?
Yep, I think you'll have to go to NG+ to do his quest line now.
Does anyone know what happens if you let him out after you've done his quest (human or Hollow)?