I'm having trouble even guessing where the traveler plot is going. Maybe like a fight club thing, where domestic terrorism is the biggest prank of all? If he's an actual god of trickery, it seems like the escalation can only get worse and worse. But if he's an Archfey like Artagon, travlercon might be something frivolous and dumb, he gets bored, and moves onto something completely different rather than escalating. If it's Artagon specifically, i have to assume it will be something to do with that door to the feywild that Vox Machina opened for him 20 years ago that has gone uncommented on up until now. Like keeping it open, or weakening the barrier between planes even more.