Board Thread:News and Announcements/@comment-3031411-20130601211439/@comment-7472785-20130602095526

Let's assume - and it can only be an assumption - that there is a bounty out for Blake (and Adam?), possibly by the Schnee family because of the train robbery.

Then Yang could be after it, as well as Ruby, them possibly being competitors originally trained together - which would explain Ruby showing up at the club.

The further story could evolve in Yang and Ruby joining forces, potentially finding Blake and deciding to join her cause (due to the Schnee's oppression?), with Weiss also ultimately joining them because she doesn't agree with her family's ways.

And thus - abrakadabra - we have RWBY!

On the other hand, it was said that RWBY will fight some, yet unknown, female adversary, so who Yang seeks may not be Blake at all (which I actually believe). But the other presumptions on the team joining would still work.