How do people feel about the topic, do they have any suggestions?
I think this is a fun idea. I wouldn't mind trying my hand at some of the guessing. I think I could pick out some of my faves with my eyes closed because I obsess over their writing like a twelve-teen girl over a boy band, but I digress...
I think a more specific prompt would be funner in terms of showing off a specific style. For instance instead of just Halloween/holiday, how about Lois and Clark go buy a costume for Halloween? That way we can see more clearly how the stories differ from each other while being able to tell a general base. It'd be fun to see how creative people can be within those limits. Otherwise it differs little from one of those "theme challenges."
Just my two cents
alcyone