I don't specifically remember, but I would assume it happened at an IAAPA conference show around the time that the movie Van Helsing came out. I say that because if Van Helsing hadn't bombed, we would have had a KUKA based ride themed to Van Helsing already.
--- Update ---
About Teebin's riddle, I'm not sure how Blue Bird plays into this, but I gather that he's referring to an AA dragon that's 55 scoops LONG mounted on a Kuka arm. I say this because he referred to it as possibly being part of a sub story, and we heard that there will be a sub story involving Hagrid's dragon on the loose as we saw in the preview video. I think the article said something to the effect that Hagrid will tell us to watch out because a dragon he was watching broke free and could be anywhere! Something goes horribly wrong!