I agree with Super T about the add-on features of a third gen. That's what always happens when they make a third game installment. I don't mean to crush anyone's hopes but new pokemon won't be introduced for at least another 2-3 years - when a new handheld is introduced by nintendo. However, I do agree about the lack of fire types in the games.

On another note, I strongly believe that a remake of Silver and Gold as well as a third installment of the D/P games are being made. The reason for the remake of G/S is that they have already copyrighted the names Dawn Gold and Dusk Silver. Other than that, there is no other proof.