What Supplements Are Coming Up?

I have been wondering what all is in the works as far as future supplements. I had no idea that Spike was coming up. Then it was mentioned that there were quite a few supplements being worked on, in fact more then are currently being sold.

So I have to ask, what supplements are being developed, and how close are they to release?

I know there are some ideas that you want to keep secret, so either be a little cryptic, or just blab. You know you want to.