Famitsu has a few tidbits about BlazBlue: Chrono Phantasma. The product page says the game will support 1-8 players, the eight players part will probably be for lobbies. The info box also says Chrono Phantasma will have downloadable content.
BlazBlue: Continuum Shift had three downloadable characters and unlocks for Unlimited Characters. Continuum Shift Extend had system voice packs with other characters like Makoto and Noel.
BlazBlue: Chrono Phantasma will be released for PlayStation 3 on October 24.