1 Mew V/VMax - of all the Fusion Strike cards revealed, it seems that Genesect would be a perfect use for Mew
So far, the only cards revealed for box toppers have been reprints of The Great Henge, Wasteland, and Ensaring Bridge, as The Party Tree, Valley of Gorgoroth, and Bridge of Khazad-Dum respectively
All control decks operate on 26-27 lands, so that gives us 33 cards to work with
Ravenous Chupacabra might be a Beast Horror, but it's eminently playable and I decided that I liked the irony of having happy little Zero for its artwork instead of the scary Hyena-looking thing that's on the original card
Henzie Toolbox Torres another commander that comes to mind as something that can make the turtle cheaper and cash in on its Treasures right away