Keeping false hopes is bad ... i agree. But just as bad is to needlessly frustrate them. :-/
Yes, we know that most of PHB should be present (corect me if you have link to their original statement, but i believe they didnt say "all" of it) ... Beyond that? We dont know anything.
And stating both absence, or presence of any other content is nothing but a wild guess. I just cant understand why people cant simply say "we dont know" rather than "nah, this will never be there since its not from PHB" ... Just by looking at the game right now is unshakeable proof that second statement is factualy false.
I still dont understand why cant we change Race for our hirelings. Lets us play Githyanki as racist as they trully are!
