Do we really need a RSE remake though? the point of remaking Red andBlueGreen, and Gold and Silver was because they were isolated, there was no way to get pokemon from those two games to the newer ones. This no longer the case as it is possible to get pokemon from RSE to white/black (I've done it myself its not so bad)
I'd rather just see some of the ideas brought back (hideouts, original style Pokemon contests, berry's returning to their old importance, and more surf and dive content)
With the help of Colosseum/XD/FRLG, it was possible to obtain almost, if not all, Gen 2 pokemon in Gen 3; So 'isolation', etc. isn't really an excuse, imo. HGSS were not needed.