I for one am predicting a remake for RSE in the sixth gen. It's the next gen in line, and most of all, the platform is being moved to 3DS. With DS systems (aside from the DSi's), you had a GBA slot. You no longer have that luxury with 3DS systems, separating the platforms more than GBA to DS did. Plus, each platform movement they remade a game. When they moved to GBA, we got FRLF, and when we went to DS, we got HGSS, so it only makes sense.
I actually just ordered a DS lite specifically to play GBA games along with my Heartgold.