Originally Posted by Chief Rum
Yes, it would appear you guys are right about EF and the possibility he could return as the Dragon.
That said, it doesn't discount him coming back in some other form, nor that it could have been a role-based move to get himself skilled.
I'd say it's very doubtful he'd come back as the Dragon, since he was an Aes Sedai (female). Dragons are definitely male.
Now, that's not to say he couldn't come back/influence in some other way.