I'm saved to a Kara instance which was a full clear with the exception of Nightbane - we didn't have anyone in the group able to summon that boss.  I'm not sure if I can start a raid under a saved instance if I wasnt the leader of a group, but if it is possible for me to do that I just wanted to let peeps know we may have an opportunity to down that boss if someone with the summoning thingie is interested.