The Heroes Chapter is the second half of the second season of YuYuYu; the first half is a re-edit of the Washio Sumi arc film trilogy for television, which is nice of them since fans of the show who didn't go to the theater or buy the discs can see the prequel. The Heroes Chapter is actually 2 arcs, one involving Mimori, the other involving Yuuna. The Mimori arc began the way it did probably as a way to throw off rabid fan speculation more than anything else, as a lot of media (games in particular) had already shown the aftermath of YuYuYu's first season. Botharcs are somewhat similar to one another, which is good because they bookend one another, but the second arc seems on the surface to be a more emotional repeat of the first.

Well, that's not entirely fair. The conflicts are different-- the first arc's conflict was largely internal, the second arc's conflict involved the entire Heroes Club. Both Heroes at the center of each arc were compelled to silence in different ways, both a violation of conscience.

The "gods must be appeased" part of the show felt like a reverse deus ex machina (and a similar deus ex machina happened during the climax). There was a similar "gods vs men" dynamic in Gigantic Formula (only that one involved giant robots), so it's not like this theme is anything new. Personally I felt that it might've been more interesting if the Vertex was a human creation gone horribly wrong, but I'm not in charge of the writing.

The buildup to the climax is a fantastic staple of Japanese anime, and one wonders just how many Heroes over how many years were thrown at the Vertex? (Ah, so that was what the promotional material meant...)

I also feel that instead of a series of stills at the end of the series, an additional episode could've been written expanding on them, but again, I'm not in control of the planning.