The movie XYZ is expected to be a flop. It was revealed that critic John Smith panned the movie without having seen it. It is feared that other critics will hold the same [noun].
Possible answers that come to mind, but I don't like are:
A bias may influence someone's views, but it doesn't necessitate having made their mind up.
predjudice doesn't necessitate ignorance. For example insurance companies may be predjudiced against young male drivers, but this doesn't come from ignorance. Also, in a modern context the term if inflammatory.