I can see it do well critically but sales will not be close to 15 million. God of War series sold 21 million units in 7 years between 2005 and 2012 so the new one wouldn't sell that well. God of War has no multiplayer and wouldn't be bundled like Uncharted 4 and its not at the height of its popularity like Naughty Dog was before the release of Uncharted 4. I can see it selling anywhere from 2 to 11 million.