I'd say the new Grand Theft Auto will be way overhyped. OPS2:A (Official Playstation Magazine: Australia) hyped San Andreas up to epic proportions, even going so far as to mocking anyone that wrote in and talked it down. Consistently, they named it to be the best ever game of its year (2006, yes?) and until Unchartered and Assassin's Creed came out, it was constantly marked as 'Best Game EVAR' in all their various lists and relists.
I'd say the new GTA will be no different. It'll be hyped up to epic proportions and when it comes out, it'll just take the old game, add a new protagonist, a same-but-slightly-different plot and all the same types of missions. Oh, and they'll just bang on a bunch of assorted 'side games' to play, like paper delivery, or rubbish collecting, or mail delivery, or running the subway, or sweeping pavements.