I had some hands on with this figure and came away very impressed.
Kevin Ellis (Sideshow's Costume Designer/Project Manager) brought out BOTH Batman and Superman for some of us to look at. Which was awesome of him to do. Really nice and friendly open guy and I know he's here on the Freaks board so THANK YOU KEVIN!
According to Kevin and some of this may have been said here, the figure bodies are totally new and designed specifically for Supes and Bats SO FAR. Batman obviously has the buffer one between he and Superman. There are nice ratchet joints along the shoulders that should help provide studier holds for poses. One downside is that the elbows are not double-jointed but Kevin mentioned this was a decision made based on the spandex costume that the figures have. The reason being that they found that double joints tend to get caught in the costume and damage the fabric. Also, due to the muscularity of the figure body, making that double joint can be tricky.
The boots appear to be two pieces with the rubber boot along the shin slipping into the crease by the ankle, this allows the ankle to move pretty freely. Hopefully there won't be much strain because the rubber can eventually split as it did on one of prototype models I handled.
Sideshow is getting better at 1/6th. Kevin says they've learned a lot and they're being more flexible, which is why you don't see one devoted figure body like the Prometheus. They hope to be able to re-use some of their newer figure bodies, but they'll cater towards the specific character.
I asked about a Black & Gray Batman (my personal favorite colors for Bats) and he said if they do it, he would prefer it to be a *NEW* Batman figure as opposed to a repaint of this one.
Kevin also noted that they wanted to go with the "classic" DC looks for their DC line because they took a look at what was out there and noticed a lack of "classic" DC interpretations of their heroes in 1/6th (Medicom is an exception but they have a different style). So they went that route but would eventually like to change them up later on with some creativity like they have with the Marvel SSC figures (Wolvie & Deadpool). It's likely if they do Superman and Batman again, they might do their "own" versions of the character as opposed to taking a pre-existing design and making a figure of that.
He also noted that if they ever did Wonder Woman, she would likely be a new figure body.
This guy was handling the figures right next to me and taking a lot of pics. So he has some good shots. He also did variations of all the different headsculpts with the various mouth expressions.
By the way, these Bats and Supes were EARLIER production prototypes than the ones they had in the display cases. So the ones in the cases were the most up-to-date with slight changes (color variations mostly).
https://plus.google.com/photos/112292106669526066397/albums/6039734390035643777?sort=1
Batman should be built like a tank, all those MMA and Gymnasts? Batman is supposed to be better than them and have an even more impressive physique.
