So, I rewatched the P4 Endurance run not too long ago and not long after P4 Arena come out. And I remembered that at one point Jeff joked about there being a fighting game, obviously 3 years before this was a reality!
In a later episode, Jeff & Vinny were discussing what if there was permadeath with characters you get attached to, pointing to Fire Emblem as an example. Now there's Shin Megami Tensei x Fire Emblem.
All I'm saying is FOLLOW THE MONEY.