In an interview on website 1, actor stated that he would be thrilled to work on upcoming superhero movie y. Riding high off the success and fan love of superhero project x, actor is excited to perform as character in upcoming projects for company, including superhero movie y and superhero movie z.
Character is known to be in sequel to original project, but until sequel comes out, there is plenty of opportunity for character to show up in superhero movie y, superhero movie z, and many other superhero movies. I know fans would be excited to see character show up in other projects for company, so we'll just have to see if character is inserted into those projects.
Superhero project X is available to watch now and Superhero project Y is out at sometime in the future.