A game with all four regions would be amazing. But, like SCV said, we'll probably see more remakes before that ever happens. It'll more than likely happen when Pokémon is starting to die out a bit.
I don't think Giratina's Origin Forme is fair to Palkia and Dialga. I mean they are in the same category, stats and everything. I know it would be a bit much, but Palkia and Dialga should have Origin Formes as well.
It's a standard feature of vB that is currently turned off on our forum. Not sure why. I'm guessing cause it is pretty useless because members just end up abusing it.