3m shipments definitely with GT5 I think.
GoW has always been huge in the US, where PS4 is now king. GoW I-II released at the tail end of the PS2 era so their sales are not a good barometer. GoWIII had a very big launch for a PS3 game (like 1.2-1.5m probably).
Heard it here first!
Uncharted 4 launched with like 2-2.5m retail only (consumer sales). Probably close to 3m with digital included (yup, 2.7m first week: http://www.ign.com/articles/2016/05/23/uncharted-4-sold-27-million-units-in-its-first-week).
Yeah I was basing mine off Uncharted 4. I expect God of War to do a bit better but not that much.
For comparison, Horizon Zero Dawn is still around the 6 million range.
Horizon is way over 7 million, probably at 8 million by now. It was announced as 7.6m sell through 2 months ago!