i seen dressed up batman and robin, they hang in front or to the side of the store next to the dark knight. wonder woman is there at times too. not all 3 at once though, usually just 1, tops 2, only during certain times of day on saturday for example.
Houdini is closed still despite the queue lines and exits marked but left intact. Closest one is in SFNE, which is suppose to be open, but then again the sf site is probably has glitches about the other parks as well. look at some descripts/pics of coasters like comet, which are different at different parks but show the same pic.