Board Thread:Episode Discussion/@comment-14138255-20160214165601/@comment-10390252-20160218103902

Remember that Roman was only meant to be a one- or two-shot stock villainous stooge, not a major figure in the Rogues' Gallery. RWBY has changed before due to viewer reaction and the like.

I doubt that this would extend to resurrecting Pyrrha, but flashbacks or some weird mystic jiggery-pokey (guiding a character on a vision quest or something) isn't beyond the bounds of possibility.