Official Reprint Policy
Reserved cards will never be printed again in a functionally identical form. A card is considered functionally identical to another card if it has the same card type, subtypes, abilities, mana cost, power, and toughness. No cards will be added to the reserved list in the future. No cards from the Mercadian Masques set and later sets will be reserved. In consideration of past commitments, however, no cards will be removed from this list. The exclusion of any particular card from the reserved list doesn’t indicate that there are any plans to reprint that card.
This reprint policy only applies to physical, printed cards. It does not apply to cards released on Magic: The Gathering Online or in any other digital distribution.
Wizards of the Coast may print special versions of cards not meant for regular game play, such as oversized cards.
A previous version of this policy allowed premium versions of cards on the reserved list to be printed. Starting in 2011, no cards on the reserved list will be printed in either premium or non-premium form.
Source: wizards.com