Currently the only announced game that will do it for sure is FF XV
FF VII Remake has a shot, but I'd say it's not guaranteed. Same for KH3.
If FF XVI comes to PS4 and is a standard JRPG then that should do it as well.
If DQ XI goes to PS4 and is a standard JRPG then that's a guaranteed millionseller.
Resident Evil 7 might do it, don't think GT7 will do it.
What else... GTA 6 is a pretty good candidate as well, if the series growth continues.
Everything else would be out of the leftfield I'd say.
I'll predict a fancy 4-5.