As you know, John Diggle will appear in one episode in every show (except Black Lightning). What if this will be the crossover event for this year, but instead of being a traditional crossover it's a cross-through?
According to TV Tropes, a cross-through is an interconnected storyline that's passed from show to show. It would make sense if they did this because of COVID and all that.
I'm probably wrong, but this is just an interesting idea i've had in my head for a while. So what are your thoughts?