@OttoKerner is the man. I’d done this mostly myself. I found the way to get the crossovers to play in order is to update the Sort Title property with the crossover name and a number (i.e. Crisis on Earth-X (I)). And it works:
@OttoKerner is the man. I’d done this mostly myself. I found the way to get the crossovers to play in order is to update the Sort Title property with the crossover name and a number (i.e. Crisis on Earth-X (I)). And it works: