What will be the best-selling Gen 8 game in Japan?

[Jizz_Beard_thePirate]

Kerotan said:

Captain_Yuri said:
It will either be pokemon or FFXV

How could FF15 sell over 4.5m units in Japan?  

Mostly cause we havn't seen what it could do but yea, it probably wont and neither will any other game by the looks of it