Fleshing out this campaign idea...
I woke up this morning with what seemed like a brilliant idea for an Eberron campaign: In Eberron's future, The Last War isn't called The Last War. It is called The First War because 20 years later, The Second War broke out. The Second War is so horrific that the BBEG has traveled back in time to 998 YK armed with knowledge from the future and plans to prevent The Second War from ever occurring.
The problem is, this idea is inherently sprawling and complex. I realized this when I spent the day filling in the nitty gritty details. And somehow, almost all the nations and dragonmarked houses on Khovaire plays a role in the leadup to The Second War. Now I am second guessing myself, wondering if all this is too complicated. Also, I have no idea who this BBEG should be. It certainly cannot be John Smith, some unknown commoner. The party would easily walk over John in the finale. Any ideas, guys?