10min+ will be hard to reach, but 8 even 9 would be great and i think one of these numbers will be correct. I don't know why people underestimate this game. Gameplay from E3 2016 reached 19 mln views and its one of the most anticipated games of this year.
People will be surprised how well this game will sell.
2 mil FW possible?
Well Uncharted 4 in first week sold in 2.7mln and so far it's the biggest Sony's IP in current generation. 2mln is very possible, and from leaks GoW will be have biggest marketing campaign in Sony's history and even bigger then Uncharted.