I would clarify that the overall numbers for the FF sales count ports, and releases as well so VII's number also involves the PSN and Steam sales and considering the game has such great word of mouth it easily had good sales but those numbers still mean the most popular entry in the franchise take nineteen years to obtain.

XV is probably not going to reach those types of sales number, regardless of word of mouth, but I do believe it will sell pretty well regardless just doubtful it will reach those numbers. It doesn't help it's being released in a time where the franchise's credibility is still recovering among the fanbase, something that is not lost on Tabata and the development team, so it will be very interesting to see how the game fares in September.