there's no precedent for remakes including new mons and it would really screw with the dexes
Mostly true, but FRLG "introduced" Deoxys, as he was unobtainable at that point and only existed in the game data. It's possible one of the unreleased mons will be available in the next remake, but as far as I'm aware they're possible to get in BW with hacked items or something.
We don't have a precedent for that. We have gen I and gen II remakes.
Precedent? Give me one reason why they wouldn't make Pokemon Yellow for its 15th anniversary in the fall of '13. It's unlikely, but Nintendo does not care at all for the availability of current mons, the fact HGSS just had Kanto, for "precedent", or anything like that. They just want money!
However, games with 2 versions sell more, so it'd be a waste of resources to put it towards a single remake.
Speaking of resources, those
expecting a remake this year are not thinking clearly. Pokemon has two "teams", the ones that make the remakes and the ones that make the main games/third versions. There's crossover, but they work on two games at once. Consider there was a 5 year gap between FRLG and HGSS, which were released 2.5 years ago in Japan. It is highly unlikely that we'll be seeing a remake of the third gen so soon.
Not to mention there's a good chance that the games will be on the 3DS! Game Freak was one of the first companies to get the dev kit, so they've had it for ~2 years. A year and a half more would be a normal dev cycle for a game, so Fall 2013 seems most likely to me.
That and I'm also just hoping for them to be named Magenta and Cyan :happybrain: