If there are missing characters in a render, then it's outdated. Especially if it was explicitly stated that these were all we would be getting period.
Based on the diagram for the Otter (if accurate), not all of the critters are going to be as simple as the Beaver. I'd also venture a guess that some of the larger ones from the most recent batch are likely to have more movement than the smaller ones. And I even say this as someone who is pretty disappointed that the Beaver appears to be so simple.
Back in September last year, Archive said that only Charlotte's father and Naveen's parents would be added to the scene beyond what the renders showed. Which again, itself is another point of evidence that it wasn't up to date. He also said not to expect any extra characters at all. Only saying that maybe a couple of static critters could be added last minute. Even with the Beaver's simple movements, it's not static.
These are very interesting. And believe it or not, they've actually partially alleviated some of my concerns about there only being 6 AA's. They do indeed look legitimate, and I can imagine it's fairly accurate to the sets they construct. But it's also clear that the renders can't be used to...
forums.wdwmagic.com
I don't know what model she is, but I sort of doubt she's a simple moving prop either. that video clip isn't remotely long enough to establish her range of motion.