Which is exactly what could happen here. Let's face it, unless it's a complete curve ball it's something involving the main series games. The translation rates between games is constantly narrowing.
I feel like it could be an announcement of a new game, with the titles only released, with possibly a Louisette. Following this, Coro Coro reveals the official image of the new Pokémon, and things go from there.
Unfortunately, this announcement seems too big to be RS remakes. Like I've said, RS remakes would seem to be more beneficial on the 3DS where we wait a few more years for a better game rather than a game which could be improved and be much better on the console which is already out there!