Upcoming in this month's Tougeki Damashii (an offshoot of Arcadia that's published quarterly that covers only fighting games):
主要タイトル最新情報:鉄拳6/アルカナハート 2/
MELTY BLOOD Act Cadenza 2(仮称) (emphasis mine)
Translation: Latest news on: Tekken 6, Arcana Heart 2,
Melty Blood: Act Cadenza 2 (working title)(lololol the site no longer mentions MB:AC 2; the article was probably pulled at the last second).
It also goes on to list Arcana Heart Full and MBAC ver.B2, so this is certainly about the new version.
Discuss.
(Source: Magikarp's Splash Attack)