They've revisited the Agents, Adventure, Dino, and Space themes multiple times, and I know that Monster/Halloween stuff is one of the most requested themes on the Inside Ideas page, so Monster Fighters Revisited would be so welcome. Apparently Lego has focus tested doing yearly Halloween sets like the Christmas one, or another monster theme, and "nobody wants them" but the outcry of "bullshit" from every US Lego retailer says otherwise. I really, really hope they do it again some day. Shit like Chima gets ~25 sets and Monster Fighters got 9 and didn't even make it a full year.