Well isn't this a sight for sore eyes. Mega Man X hasn't graced retail game packaging since, gosh, Maverick Hunter X in 2005:
X is but one of many iconic characters gracing the packaging of Project X Zone (closer image here). Due on October 11, the first printing of the game will come in a special box that includes a character profile booklet and a "crossover soundtrack CD" featuring the game's background music. You better believe there'll be some Mega Man X tunes in there.
Whether or not PXZ will release outside of Japan is still a looming mystery. That decision rests with Namco Bandai, not Capcom.
Be sure to check out Andriasang's full report for more PXZ imagery.