The Order: 1886 will, of course (sales wise). The game just appeals to a wider audience and seems to have great pre-orders. But I think Bloodporn will come close to it as I'm predicting 2.5m LT sales for it against 3m LT for The Order.
Bet with Teeqoz for 2 weeks of avatar and sig control that Super Mario Odyssey would ship more than 7m on its first 2 months. The game shipped 9.07m, so I won