While the Alliance and the Cults are making their own plans for the upcoming crisis, Aaron was making his own set of plans to deal with that.
He was one of the hundred who knew about this fact. If not for the leak, the hundred would have been the only ones who would have known about this upcoming crisis.
When will this crisis erupt? He has no idea, as he clearly remembers that there was no mention of that in the notification.
Though that was the case, Aaron knew that it would be sooner rather than later.
The notification told him that the planet would be upgraded. So, at the beginning, he didn't bother much about that, not until after the first-year tournament.
Till then, he was busy improving his level and attributes. Nothing else mattered much. Only after entering the Undead Ruins did he understand that without proper knowledge, he would be hindered.
Only then did he start reading more than usual, and it was when he came to learn about the upcoming crisis.