Mickey Mouse horror film unveiled as copyright ends

It'll be interesting to see if Disney tries to stop it. If they do (maybe via trademark [which "should" fail]), it'll mean more publicity. If they don't, then the film will probably quietly make a bit of money and we'll see people playing around with more old characters in new lights.

I'm not super into mickey mouse, but the huge variety of rather enjoyable Sherlock Holmes parodies tells me that characters and stories becoming part of the public domain will be a net good for culture.

Would this have already been legal under the parody exemption?