Due to his experiences in underworldwars/tartarusnet, as well as being able to carry over his memories into towerofanimus, Minato found himself discovering spoilers.

This post list all the important information he learned, particularly things that happens after his canon point.

CONTEXT: Canon point is October 2nd. Spent 11~ months in the Underworld, before coming to the Tower.

( P3 SPOILERS )