User blog comment:Jkphantom9/Volume 3 Episode 5 Preview/@comment-4010415-20151204040732/@comment-4010415-20151204194340

The Volume 2 Trailer mainly showed content from the first four episodes and a couple brief moments from later episodes.

I think the sneak peeks are supposed to keep us interested and hyped, since people became so uncertain after... y'know. That, and the way that the writing has been so far. But it seems that Volume 3 has struck a great balance and pacing so far.