I don't think any of it fits. "Tiny fragment" and "fraction of a line" don't sound like blood spatters, or anything liquid. The sound of black robes falling doesn't sound like bodies hitting the ground, and if this were the fulfillment of the Chapter 1 epigraph, I would expect there to be at least a mention of their robes.

This whole scene doesn't seem significant enough to be such a heavily anticipated revelation. I'm going with "No" on this one.