There have been a few rumours being spread around the internet that it will. I know that there is a map that shows a road leading off past anville town, but you can't get past it (some kind of subway map, i forget) and this may lead to a new area. But the likelyhood of them adding a whole new region on would make the game too long because each region has seperate stories, unlike gold/silver and red/blue. I do however think that they will hint towards it a lot with 3rd gen pokemon in the game. I think nintendo want to make money, so they would make remakes for hoenn in a seperate game. It logically seems like the only way we will get hoenn again is in a ruby/sapphire remake :D
