It has an outside shot at 20m. Is it possible? Yes. Is it not possible? Yes.
IMO, it should wind up around 16-18m.
I'd say we should see the X360 version hit 8-10m sales (just below Halo 3), and anywhere from 4-8m on the PS3, depending on how the PS3 does in the coming months.
GTA is a very casual series. Don't expect insane frontloaded sales. Even GTA:SA sold a mere 1.5m copies on it's debut month....But it sold 1m+ copies for 3-4 months straight, and sold more than 100k a month in the US for more than a year.
Back from the dead, I'm afraid.








