Sega has said it's not yet ready to confirm the Vita and mobile versions of Phantasy Star Online 2 for release in US and EU.
The publisher confirmed earlier today that the PC version of the free-to-play multiplayer action RPG will launch in North America and Europe next year (along with releasing a new trailer and gameplay details, all through that link), but nothing was said of the portable versions.
"We can't confirm any details about the final platforms for the North American and European versions of PSO2 at this time," a Sega rep has told Joystiq.
The Vita version was announced in March when game producer Sakai Satoshi confirmed that Vita players will be adventuring alongside PC players on the same servers and will be able to play the same character on both versions. The mobile version will, on the other hand, be a separate simplified venture with social elements.