SAF and Alan Gura are going after Maryland now, for their arbitrary permit issuance. Maryland is in the 4th Circuit, along with Virginia, West Virginia, and the Carolinas. Culturally this seems to be a good place to go after carry, since Maryland is the outlier in that circuit in terms of issuance of concealed carry licenses, rather than the rule, as New York is in the 2nd Circuit. Dave Hardy notes it looks like a solid case.
UPDATE: I should note that New York shares its circuit with two other states, Vermont, who issues no permits because they are not required, and CT, who do issue permits on a mostly shall-issue basis. But population wise and culturally, New York dominates the Second Circuit.