The source is the same dude thats leaked the characters in Super and both versions of Marvel.
Its looking good for Juri if this holds any value.
Lupinko, well known for leaking the list of Super Street Fighter IV and give some characters in Marvel vs. Capcom 3 says those are all the characters from Street Fighter x Tekken.
We can ensure that it is good at what he does but has not always been the point.
Ryu / Ken Masters
Chun Li / Cammy White
Guile / Abel
Dhalsim / Sagat
Hugo Andor / Poison
Cody / Guy
Sodom / Rolento
Ibuki / Makoto
Zangief / Rainbow Mika
Kasugano Sakura / Karin Kanzuki
Mayor Bison / Juri Han
Secret Character: Evil Ryu and Akuma.
Kazuya Mishima / Nina Williams
King / Craig Marduk
Julia Chang / Bob
Hwoarang / Steve Fox
Yoshimitsu / Raven
Jin Kazama / Ling Xiaoyu
Bryan Fury / Jack
Lars Alexandersson / Alisa Boskonovitch
Paul Phoenix / Law (not sure which of the two if Forrest and Marshall)
Asuka Kazama / Emilie de Rochefort
Heihachi Mishima / Kuma
Secret Character: Devil Kazuya and Devil Jin
In addition to exclusive to each console, which said nothing. How about this list?