Toy Story Effect

When a movie series wraps up, and the viewers think it can't continue because it was a perfect ending.
Then the movie studio releases the trailer for the next one and you become really excited again

Person 1: New trailer for the 4th one

Person 2: not interested. The trilogy wrapped everything up perfectly

Person 1: At least just watch the trailer

Person 2: Ok *Watches Trailer*

Person 1: So what do you think?

Person 2: *says nothing, and instead preorders opening premiere ticket

Person 1: Seems to be the Toy Story Effect to me