Mark Millar.. I feel like I should recognise that name.
What!? Killer Croc? Wouldn't of guessed that one. David Goyer wrote a small piece for Croc in the Gotham Knight series. He was under Scarecrow's fear toxin for fear of bats. The general background was circus freak with bad skin condition, chiselled his teeth to razor sharpness. That could only mean, yippee another small role for the Scarecrow..
Deadshot I would like to see. That was another short story in the anime series, also the best suited to Nolan's universe if you ask me.