It is anything but clear that Victoria 3 will never become a "thing". It has been stated that it's not likely to happen soon, which does NOT mean "never".
Another expansion would be most welcome, but at this point I suspect that nobody really remembers anything about the internal workings of the game anymore, so it would be hard to go back and make changes after all this time.
Personally, I don't do multiplayer (not viable on a dial-up connection at home, and not possible at work), and have zero interest in achievements. I don't need to impress myself, and nobody else cares about some other player's "achievements". If you want Ironman mode, just don't reload; problem solved. As for DLC and additional content, I'd welcome it, but as said, the development team has probably forgotten 99% of everything they did, and would have to learn it again practically from scratch. A new game makes more sense.
