They look interesting.
Linky It's like an attrition ladder tournament. I worry that Trolls with their Tough rolls will do much better as Defender holders than pretty much anybody else, but then I guess that means you have to plan for it.
There's also an award for best painted single warbeast. In my group, that definitely won't be me...
My only hope is to drop the person with the longest defending streak and win the blockade runner award...