The Irregular at Magic High School: Reminiscence Arc has been adapted into an anime. According to the official Twitter, the format of this new adaptation has not yet been defined; it's unclear whether it will be an OVA, a movie, or even a new season.
Check out the teaser that was revealed:
Furthermore, it was revealed last year that after the second season, new adaptations would be coming for fans. Check it out.
Finally, The Irregular at Magic High School (Mahouka Koukou no Rettousei) ended with its 32nd volume.