There's also numerous spoilers in this video, featuring Marshall Sutcliffe from Limited Resources, Nathan Holt from Walking the Planes, Chris Kluwe - former NFL player, Kenji Egashira aka NumottheNummy on Twitch, Toby Elliot - Level 5 Judge, Brian-David Marshall - Pro Tour Historian, David Willians - Pro Poker and Magic player, and Kathleen De Vere from LoadingReadyRun.
http://www.youtube.com/embed/U09xnozP3gQ
Out of the cards shown anywhere, I really like Selvala's Charge. In a 4-player game, a possible 4 3/3 Elephants for 4G looks strong. I also like Deal Broker. I mean, a 2/3 Looter for 3 is still strong, but the trading at the end of the draft is amzing. Feels a lot like high school days when you would trade just after cracking packs.
In the video, they had one called Lore Seeker. Artifact Creature: Construct, a 2/2 for 2, so Bear. BUT, you get to ADD a Booster Pack to the draft. It sounds like amazing disruption. You can go get another Conspiracy for more disruption, something from Urza's Bloock or Modern Masters for power, or go get one of the Un's for super-silliness.
However, in the circle I run with, Marchesa, the Black Rose is the one we're all looking forward to. She is a supreme choice for a nice Grixis Undying Commander deck. There's also a LOT of other cards that work with her, like anything with Undying, Graft, Monstrous, Evolve, and numerous, numerous cards like Anthroplasm, Deathbringer Thoctar. Festercreep, Floodchaser, Mindwarper, Novijen Sages, Simic Manipulator, Spike Cannibal, Spitting Hydra, Stingmoggie, etc. But, we all pretty much said three specific cards will make this deck absolutely nuts:
Mikaeus, the Unhallowed, Necropotence, and Goblin Bombardment.