As I think someone else pointed out, while Batgirl's alter ego was in the Killing Joke fairly prominently she didn't actually appear as Batgirl at all. And the duck boat is a pretty overt Burtman reference, so I'm still gonna call the fedora Joker a movie throwback, just not a set actually based on the film.
Also, what I really wish is that DC would run some cartoons for the sets to be based on like Ultimate Spider-man, in the sense of adding more obscure characters. Brave and the Bold has been gone for a bit now, so they probably won't be using that as a source, but as bad as the cartoon is, Ultimate Spider-man is the only reason we've gotten Iron Fist/Power Man/Nova (though we may have gotten Nova in GotG sets later depending on how the movie goes). It's too bad DC isn't pushing their other characters a little harder, or at least running a JL cartoon (as far as I know there isn't one on the air right now?). Would like to see some support characters like Black Manta, Professor Zoom/Reverse Flash, Martian Manhunter and obviously Green Lantern and Sinestro.
All that being said, nice to see some new photos. Everyone was hoping for a brick-built Sentinel and really, it looks about like what I'd expect from an official set. I bet it could be modded into something better pretty easily, if that's what it looks like. Disappointed though, that if we're only getting one new X-Men set it's gotta have two characters we already got in the only X-men set to come out already, even if it's nice to see Wolverine's cowl. Would've much preferred the Blackbird come with Storm, Cyclops, and Beast + Sentinel and another figure or two (not a huge X-men fan so I don't care who fills in the rest, mostly just want 4 different protagonists to make a sort of 'core' team with).