I dont think it needs to sell 20 million to be considered successful when the previous gamein the first few days
let's see what happens long term like I said and how much it slows down
it has already significantly slowed down
also remember a lot of people who ended up hating the game obviously bought it as soon as it released due to hype as they went in blind
a lot of those people were going to buy the game as soon as it released regardless
the key now is how well it sells after the bad word of mouth and disappointed fans
sold that in 7 years across two generations. Most games these days dont even reach 5 million sold.
This game should easily sell 10 million plus games , which means it was successful.