It seems the recent press leak was true as Bandai Namco have officially announced Project X Zone 2 for the Nintendo 3DS. The game will feature new characters including Haseo from .hack//G.U. and Kazuma Kiryu from Yakuza: Dead Souls. Monolith Soft are returning as the developers.
Below is the list of confirmed characters so far:
Kazuma Kiryu and Goro Majima from Yakuza: Dead Souls
Akira Yuki and Kage from Virtua Fighter
Hotsuma from Shinobi (the PS2 reboot)
Erica Fontaine and Ichiro Ogami from Sakura Wars
Dante and Virgil from Devil May Cry
Leon from Resident Evil 6
Chris and Jill from Resident Evil: Revelations
X and Zero from Mega Man X
Strider from the Strider series
Bandai Namco characters
Yuri Lowell and Flynn Scifo from Tales of Vesperia
Jin Kazama and Kazuya Mishima from Tekken
Kite from .hack
Haseo from .hack//G.U.
Natsu from Soulcalibur V
Project X Zone 2 is expected to release exclusively for the Nintendo 3DS this Fall in the West.