These games look great. Going off of this post from another forum I frequently go to, I can see why they would go back to the color system.
QUOTE said:The president of The Pokémon Company admited that the original Gold and Silver were intended to be the last in the series. However the success of Pokémon Gold and Silver forced him to change his mind since it was selling faster than Red and Green.
They also added that with Balck&White they want to reinnovate every aspect of the games. Since the latest releases are HGSS (remakes of Gold and Silver as we all know), the names Black&White are probably referring to a new, fresh start of pokémon, keeping somewhat true to Gold and Silver being the last ones before any major overhaul of the series.