It seems reversible box covers are all the rage in recent Tales of Series games these days. The official Tales of the World: Radiant Mythology 3 site has just been updated, announcing that the game will indeed have a reversible packaging.
The other boxart uses the same artwork Namdai used for this promotional poster. At the back part of this alternate cover are the Mystic Arte cut-ins of Rita, Raven and Guy. The other half of the back is covered, so there may be more being concealed underneath.
Tales of the World: Radiant Mythology 3 will be released on February 10, 2011 for a price of 6,279 Yen. Pre-orders are now available at Play-Asia for both the Japanese and Asian versions. Yes-Asia has the Japan version as well.