Browse the list of big movies in order of release date, and add to calendar the movies you're interested in. The top of the list only contains highly anticipated movies.
I made movie2cal about 4 years ago but recently found a big bug I had to fix, so let's celebrate.
I've been adding movies to my calendar but I just noticed that the release date was wrong for the Mario movie because I didn't set the region. So now I've implemented region selection, and it's working great.
movie2cal