Here's what I know (or think):
Flint: Dead, from WC3 novel
Vaquero: Dead, from WC3 novel
Flash: Dead, from WC3 novel
Vagabond: Dead (from game); novel unspecific
Rollins: Unknown
Sosa: Survived, presumably working at Confed Intel
Catscratch: Unknown
Doomsday: Survived, presumably pilot in Landreich military
Bondarevsky: Survived, condition unknown
Hunter: Dead, from Fleet Action
Knight: Dead (?)
Iceman: Dead
Panther: Survived, presumably instructor
Eisen: Survived, current condition unknown (Jason Bernard, the actor who portrayed him, died in 1996)
Anyone know any others?