No. The remake game is over.
They aren't idiots and know it.
Simple plain copy paste remakes will not do the job after HGSS.
Of course there will always be more visits to the good old regions, but they will have to figure out something more interesting than just releasing the same game again.
With BW having sequels in BW2, its not at all a stretch anymore (as it was when Ive been contemplating the idea numerous times in the past but didnt know if it would ever occur to them), that they could do NEW games in OLD regions instead of bland remakes that will make more and more people annoyed and sales of such games never again even remotely resembling HGSS in numbers.
I am confident we shall see Hoenn soon, but for all that is holy, if its gonna be through remakes, Gamefreak will lose a lot of respect from my side. And make less money than previous remakes.
RS in particular will be ESPECIALLY pointless once they start releasing GBA games through the e-shop for 3DS.
My theory, or rather what I would do in their place is, introduce MID-generations.
That is, smaller generations (think ~50 pokemon), appearing between proper ones, which revolve around revisiting a classic generation in a later time.
With many changes and additions, but plenty of nostalgia at the same time, through old characters, their relatives, the old hero, while adding fresh stuff, spicing up some of the native pokemon (evos and alt-evos)... you get the idea.
That would be amazing, satisfy everyone, and disappoint no one (except for people who dont like new evolutions).
This would work for any generation as it could freely add new things, while exploring anything left untold.
In short:
Screw remakes, Sequels are the way to go.
I'm not sure about gens 4 and 5 remakes. First thing is that storylines of D/P and Platinum can't mix with each other. Second thing is - does Sinnoh have anything that was clearly missing? I mean, Kanto was lacking of post-game areas - they were added in FR/LG. Johto was lacking of Safari Zone - it was added in HG/SS. Hoenn has great potential of having more post-game islands, more inventions developed in Devon, showing rocket launching in Space Center, having Jirachi event and possibly Deoxys event in Meteor Falls. Does Sinnoh have anything that is asking to be added? Sinnoh seems to be complete imo, the same like Unova will be in B2/W2.
So cant Emerald mix with RS. That generation started the "third version is the full story" thing.
Potential for more features depends on your imagination.
There is nothing clearly missing in RS or DP. For GS there was tons of excluded things because of limited space (Viridian Forest, Seafoam islands, Power Plant).
Rocket launching in space center wouldnt add anything except for the scene itself, while adding stuff that wasnt there is just as reasonable as it is for any game.
You could with the same logic say that DP could have more islands and more features like poketch... and a Manaphy event at some beach..
Dont get me wrong, Im not saying we should never go back to Hoenn, just that it was perfectly fine and finished. A nice complete adventure, especially with how Emerald filled everything left, like a proper cave in the volcano for the Magma base.
If they want Hoenn to be interesting in a new game they will have to ADD NEW THINGS, because a bland remake won't have much to improve at all. Do you really just want a graphical upgrade and seeing the rocket launch?
Which brings me to what Ive said above.
Diamond & Pearl are fine as they are, Ruby & Sapphire aren't in terms of graphics, events etc. The only games in need of a remake are Pokémon Ruby & Sapphire.
You realize that once the next generation arrives DPtBW will not be "fine" in terms of graphics either, right?
RSE feel and look perfect for what they were meant to be IMO.
I doubt gamefreak had many thoughs along the lines of "geez I wish we could have done this and that but the current graphics make it impossible"
Wouldnt you rather they put the original RSE on the 3DS e-shop AND released Hoenn based sequels as new games instead?