Board Thread:General Discussion/@comment-184.91.235.102-20131201181623/@comment-15145664-20131206083113

RWBY has made countless refrences to other sources so far, but one thing I don't think they're going to do is pull a Darth Vader; that would just be too over the top.

More likely, I think, is that Cinder is responsible for Summer's death and thus Ruby wants revenge against her. (even if she doesn't know it's Cinder specifically that she's after.)