I don't think they would and if they do then, that's silly. They would be remaking a remake. The games already have good enough graphics and one reason they remade Red and Blue is because not alot of gen1 Pokemon were available on Ruby and Sapphire. Plus it's a classic and they wanted old fans to return to the franchise and reminisce about playing Red and Blue. But it would be unnecessary at the moment since you can easily get all the Pokemon from previous gens through transfer and trading. Plus I've explored Kanto 4 TIMES ALREADY and I'm tired of it frankly. I don't want to explore it a 5th time.
A Hoenn remake would be better.