I wouldn't want an RSE remake. As much as the Gameboy Advance has fallen out of the normal rotation of systems, the 3rd generation games are still accessible in terms of being able to reach back and pluck your beloved Ruby/Sapphire/Emerald/Firered/Leafgreen teams from the 3rd generation. You'd start by transferring them to the 4th generation, and then to the 5th generation. I feel as if the reason for the first two generational remakes is because each game had fallen out of the circle of Pokemon transference. They updated the games so you could experience the games you want while maintaining compatibility.
Regardless if this is correct or not (just a personal theory), I don't understand why people want an RSE remake. They were great games, but isn't everyone done with the constant rehashes of the new ways to obtain 3rd generation legendaries? You can get all of them via 4th and 5th generation games in multiple different ways. Remaking the 3rd generation brings nothing new to the table. Especially with B2/W2's expanded Pokedex, no single Pokemon seems out of reach for the completionists out there.
Personally, I wouldn't mind a 6th generation. Generational continuations are always an exciting and tumultuous time in the Pokemon fandom and it would be great to experience another. Theories, rumors, puzzles, discoveries, trailers, and screenshots are always very interesting. I also wouldn't mind a Colosseum/XD:GoD style game that is more extravagant and fresh for the Wii U. I don't think the announcement is being made for a spin-off, that seems a bit anti-climactic. Masuda's tweet about "gather everyone for this announcement, even non-Pokemon fans" sounds like something revolutionary is coming our way. I'm excited to see what it is, and hopefully it breathes new life into the franchise.