Well, we have yet to see how exactly the origin characters will be introduced, it could be different, but due to him being an origin character, he can hardly be introduced in Act 2. Also, currently, Gale outright tells you he was on it when you meet him, and he has a tadpole, just liek the rest of us.
Edit: Wait,Ammelysan the Blackhearted? If there was ever a villain in no need of resurrection, it is her. Sheesh, that would be terrible.