User blog comment:Zolnir/RTX 2014: RWBY Panel Questions/@comment-173.248.23.37-20140706144519

Jeez....for Ozpin to be killed off, it's got to be against someone insanely powerful. I could see it being Cinder...

Either that or the "Die to save the heroes" plan of action, where he dies fighting a ton of Grimm, but he gets overrun in the end, giving Team RWBY enough time to flee.