I've heard the same thing. I didn't know they were releasing them this soon though. From what I understand, they're on the same platform (I don't know how extensive the changes are).
Also, the Saturn name is a let down. Why don't the name it HUE (like colors) or ICE or something just to go along with the VUE and ION (and SKY??). Maybe they could just call is VAN?
BTW... the Buick is Terraza... still a weird word, just not as strange as what you typed.