Dick Grayson / Nightwing.
Grayson has has a long history with the Joker, being a Robin and beyond but really his biggest beef is with Two-Face, so I cant really see the drama being played too thickly with The Joker here. I can see Nightwing taking more of a wingman role to Batman in this Death of the Family and given his recent spotlight within the Night of the Owls storyline I cant see Nightwing getting too involved here.
Chances Of Getting Killed: The recent Night of the Owls event set up an alternative destiny for Dick as an Owl and I think that still has places to go, so killing him off seems very unlikely to me. With that said, the connection to The Court of Owls could give Nightwing a death, that could potentially lead to his resurrection Owl style. Weve now seen the way this is done (with a little help from Mr. Freeze), so maybe everything we saw in the Night of the Owls was set in place so that the death of Nightwing (or Batmans first Robin) could be played out but with a sneaky back door out of his demise. Remember Nightwing pre DC 52 had a while where those in charge at DC toyed with killing him off before fans kicked off about it. Maybe they want to try again here.
Shock Value: If Nightwing is killed by The Joker my jaw will literally hit the ground so the shock value is running very high. That said, if it did happen the Owl resurrection fall back is there, so once again, this potential shocker levels off somewhat. I'd still be knocked off of my feet if it happened though.
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