Zoo hasn't been competitive for quite some time, maverick is T2.I thought that Mavrick and Zoo played Voice. Now I don't know if they are still tier 1, or even 2 for that matter, but I thought I saw them in there somewhere. I also haven't played legacy since UG Thresh was the "go-to" deck.
It was predicted a few months ago on one of the major MTG forums, think mtgsalvation.Pretty surprising. I don't think they've ever capped an event before have they?