The only unlockables I've found are Shin Akuma (Shin Gouki in Jpn.), EX-Balrog (EX-M.Bison in Jpn.), and Final M.Bison (Final Vega in Jpn.). ;)
For those that don't know, EX-Balrog (EX-M.Bison in Jpn.) is the exact same version as his SFA3 CPS2 arcade counterpart, where all punches are exactly the same.
Are there any other unlockables besides teh characters? I was looking though Edit Mode, and there are some -ism Plus tags that look like some could be unlocked. They had [???] tags in this mode, so I'm wondering if these might have to be unlocked through World Tour mode? o_O