Namco Bandai released a few screenshots of Project X Zone, a crossover strategy RPG with characters from Namco Bandai, Capcom, and Sega. Most characters are in pairs like Street Fighter’s Ken & Ryu who can do a Shinku Hadouken & EX Hadouken special attack.
Project X Zone also include characters from Tekken, Tales of Vesperia, .hack, Xenosaga, Super Robot Taisen OG Saga, Valkyria Chronicles, Sakura Wars, Space Channel 5, Shining Force EXA, Virtua Fighter, Resident Evil, Devil May Cry, Darkstalkers, and Mega Man X. Check this post for a list of confirmed characters.
Famitsu has more screenshots and some of them have three person teams. Ulala from Space Channel 5 can join Shining Force EXA’s Toma and Cyrille. Sanger Zonvolt can partner with Kite and BlackRose from .hack.
Project X Zone is slated for release this year on Nintendo 3DS.