Originally Posted by psylockolussus
It still had Professor X, Magneto, Mystique and Beast who all appeared in previous X-Men movies.
Given by First Class' performance at the box-office, I doubt FOX would want to risk by releasing another movie with a bunch of B and C list characters.
As many have pointed out on here, FC was not a failure and is the highest rated X-film. There is not that much difference in box office between the films. All these characters need is a good introduction and good film. Then they will sell. Prove you have a good product and entertaining characters and people will show.
There is nothing wrong with introducing new characters or films. The industry already suffers enough from that bs.