Sometimes expectations can be too high, for example "Independence Day: Resurgence" I knew exactly what to expect, so I was able to enjoy what it had to offer.
There is also a thing that expectations will increase over time, as most customers naturally expect that future products will be more developed.
This is a problem for older franchises, they need to retain their original appeal, and deliver a better product. The latest hollywood nostalgia products managed to deliver superior graphics, but the story/plot hasn't improved (and in some cases it has become worse).