Wow the first wave seemed like it was a huge success and all the reviews in saw were very positive. I hope they do release a second wave. Toynami really need to have someone updating their website regularly
They may have been a success from a technical point of view, but perhaps not financially. While TRU carried the 6" static figures, they apparently passed on the 4" figures. The only brick-and-mortar store I've heard carrying these is FYE. Beyond that it's online vendors. Maybe the sales weren't there to warrant a second series.
Hopefully someone can get an answer from them at Comic Con.