As confirmed in this week's issue of Jump, the latest characters to join the roster of J-Stars Victory Vs. are Pegasus Seiya from Saint Seiya and Allen Walker from D.Gray-man.
Pegasus Seiya will be playable, while Allen Walker joins as a support character. There's also a silhouette in the bottom left corner of the scan (via APForums) that teases the announcement of "that character," who looks like Hisoka from Hunter x Hunter, in the January 21 issue of V-Jump.
Previously announced characters include:
Kochira Katsushika-ku Kameari Kōen-mae Hashutsujo
Hunter × Hunter
Chinyūki -Tarō to Yukaina Nakama-tachi-
JoJo's Bizarre Adventure
Jigoku Sensei Nūbē
Pyu to Fuku! Jaguar
Neuro: Supernatural Detective
J-Stars Victory Vs. is set for a March 19, 2014 debut on PlayStation 3 and PS Vita in Japan.