A poster on MTGSalvation reports that with the release of Duels of the Planeswalkers for the Playstation 3 (PS3), players will be able to take a voucher to their local game store and receive a Lilliana Vess Promo card. We assume this is in the same vein of the Nissa Revane promotional cards from the last DotP release. No art has been provided at this time.

The Nissa Revane promos were not alternative art in the traditional sense, the art was slightly modified as the ESRB (Entertainment Software Rating Board) thought the art was too revealing and so the art was changed to cover up her revealed chest.

We have requested more information on the art from Wizards of the Coast and will update once we learn more.

Source