I agree 100%The Zamperla mini seems too 'babyish' even for Thomas Land. It's going to have a very limited audience as once they figure out you don't get wet they'll be bored.
It really is too small for Thomasland. I'm fairly confident that it will be something bigger than the Mini.
The word "splash" always makes me think of those splash-battle rides. But I'm more confident with my thoughts of it being a mini log flume like the one at Chessington.