It's a simple question that could be fun to discuss.
What, or who, would you like to see a reference to within the world of Erf? Would would, when you saw it, make you go "boop yeah!"
No surprise, I'd love to see a suitably ridiculous character based on Groucho Marx, or heck, all the Marx Brothers. Carnies, the lot of them. I'd also love to see more comic book references.
Perhaps at some point a turnamancer that is so old that his signamancy has changed completely nearly a dozen times will appear. And maybe that turnamancer will have in his possession a blue box. And this box, through a trick of Foolamancy, could possibly be bigger on the inside. If these things were to happy, I think a number of people would clap.
Basically, what subjects are you interested in and would like to see included?