I got my hands on the T&T book a bit early and noticed a couple of possible new terrain pieces. I posted two pictures of possibly new terrain pieces in the T&T book. Hopefully these are not just scratch-built pieces.
Circle Type Terrain
[URL="http://imageshack.us/photo/my-images/194/6k8y.jpg/"]http://imageshack.us/photo/my-images/194/6k8y.jpg/[/URL]
Portal Type Terrain
[URL="http://img34.imageshack.us/img34/752/utzn.jpg"]http://img34.imageshack.us/img34/752/utzn.jpg[/URL]
Maybe another double terrain kit like the Arcane Fulcrums collection