The fear that something you're really looking forward to will be a huge disappointment. A mixture of high hopes and pessimism from past experience. Applicable to events, the next book or movie in a series, and particularly to movie adaptations. Especially prevalent if people involved have a poor track record.
Anticidread turns to anticipointment if the worst does indeed come to pass.
I had a lot of anticidread about the office Christmas party after last year, but the boss wasn't there this time, and it was great.
I'm really anticidreading the Suicide Squid movie. Mickey Rooney is perfect casting to play him, but I've heard they threw out most of the comic book continuity, and changed the origin. Also, it's the same director as Barbie vs. Predator, so I don't know if he can pull it off.