Well, SE is giving their all to make this game their best selling game ever. The changes when it comes to gameplay, world, driving cars and the like. It seems that they want to "modernize" Final Fantasy franchise.
Final Fantasy XIII was an attempt to 'modernise' the franchise as well. They went all in with changes to that and hyped it to death, didn't exactly set sales records though.
Bet Shiken that COD would outsell Battlefield in 2018. http://gamrconnect.vgchartz.com/post.php?id=8749702