A new cinematic trailer of the mod has been released, providing some backstory to the mod and a (perfectly logical) reason for the fighting started! What makes it interesting is that it's the first proper fan made machinima video ever made for Serious Sam 3, made using just Serious Editor 3.5 save for editing.
Another point of interest is that the trailer showcases two player models from the upcoming Content Patch 2 update, Crash Bandicoot (from Clash of the Titans) made by Devostator and Sexy Chaos.
You'll probably rather want to actually watch it, so the link to the HD YouTube version is here:
(the same video is also in the videos section)