This mod will update your XML2 files with sounds for the following characters:
Black Panther
Black Widow
Blade
Captain America
Captain Marvel
Daredevil
Dr Strange
Elektra
Ghost Rider
Hulk
Human Torch
Invisible Woman
Jubilee
Magma
Moon Knight
Mr Fantastic
Ms Marvel
Psylocke
Silver Surfer
Spider-Woman
Thing
Thor
Beast
Emma Frost
This is mostly for modders, as you'll have to reference these in your herostat.
Also, you get power sounds (no voices) for
Nick Fury
Spider-Man
I would have added pretty much every character, but ZSM Editor didn't auto calculate numbers after 5000 files, plus that gets to be a lot to load into memory.
http://www.sendspace.com/file/7fafdlExtract to your X-Men Legends 2 directory