Get it. The whole point of the new games are to bring back the Johto region, re-enhance it, add things to it, put in more functions, ect...
They're supposed to be many times better than the old ones, or so I've heard. Just go to some sites with info on it like
Serabii.net for info on the subject.
Personally, I'm getting the game as soon as it comes out, but you can wait until a little after the 14th, or whatever floats your boat. They're supposed to be one of the best yet though.
So TL;DR: You should, because these will be a lot better.
__________________
My future Soul Silver team:
Feraligatr, Noctowl, Ninetales, Raichu, Dragonite, and Tyrantitar.