User blog comment:Rassilon of Old/Silhouetted characters on the Young Justice: Invasion poster revealed!/@comment-66.87.110.190-20120830201003/@comment-1038387-20120901201222

She's ballast.

Raven's a "heavy" character, not one whose history and raison d'être you can just gloss over. It has implications concerning the cosmology of Earth-16, with demons and extradimensional realms. Plus, she's not really necessary with her power set or the current plotline.