You know it's going to happen. Some of the best-selling classics out there. Why not release them in the eShop? :P
If Red and Blue or Gold and Silver were released in the eShop for the 3DS, what kind of stuff do you want to see in them?
The only thing I would change would be fixing the glitches that could screw up your game and making it so that you could trade with others through wireless communication. Other than that, I would keep them completely untouched and release them for the Virtual Console. Or even better, make them 3D Classics. :D
Now to wait for all the nostalgia fans to take over... xD