God, I still have to open my Clayface. He's been sitting in the shipper ever since I got him at release. I think part of me is just worried about finding space for him, but it's better than the general catch-all platform he's become. The other part of me is probably worried about wanting to commit even more to the line. Other than him, I only have Scarecrow (4, actually

) but he's skinny and doesn't take up too much room. But if I open Clayface, I'm gonna want Batman, and then Joker, and of course Harley. Mr. Freeze looks cool too, and all the recent Two-Face photos I've seen kick ass. One of my LCS has had Phantasm hanging around for a while, and she looks hella cool too. It's a slippery, slippery slope.
But as far as future releases, I'd say Riddler feels the most crucial. Ra's feels like an easy sell for most folks as well, and has enough to make a deluxe feel pretty easy- the Anubis demon mask thingy, etc. I know Killer Croc has been on their want-to-do list for a while. Penguin
feels crucial, but I'd be interested to see how they'd do him, since he's so round. But they had no issue with Man-Bat, so I'm sure they could pull off horizontal girth versus vertical height. I think the only other one that
may push me over the edge in terms of getting would be Mad Hatter. Maybe Ventriloquist, but I'd be shocked if they go that deep. If and when they start dipping their toes into TNBA, though, that's a whole other ballgame....