Love this idea. At first read I think you might be confusing Spren, which are associated with emotion or surges, with concepts (glass beads) in the cognitive realm. I think we'd most certainly have batman "beads", perhaps a multitude of them, with the varied incarnations the poor man has been through over the years. (Honestly honorspren are pretty close to what we might otherwise call herospren, as they embody the ideals that most superhero characters stand for. Batman being a somewhat gloomy, pragmatic alternative version (Grizzlespren? Broodspren?)
Now, on re-reading here, I'm more interested in your question of what kind of spren we might see in our culture that might not exist on Roshar. What kinds of emotions have we invented in recent history? Why, Geekdom of course! The kind of love that we express for the fictions/hobbies/concepts that we form geekdoms around strikes me as something sprenworthy. We'd see them at Sanderson book signings, all over conventions, etc. Would we have different kinds? I like to think our emotions can run so high as we almost constantly and intensely contemplate our topic of choice, that "geeks" as we are known would more likely have come to be identified by their almost constant flock of spren, hovering around our heads, enjoying our concentration, our theoryspinning, our devotion to something we find beautiful or amazing or true, even though on the face of it, it is not "real life" in some way. We'd instead be known as "glowheads", or "cloudheads," or what do you think?
